If you were celebrating your mom's birthday with your family, what would you wear?

For Canadian American starlet Paulina Gretzky, the answer would be obvious: A sexy leg-baring, cleavage-enhancing outfit!

The 25-year-old hockey heiress celebrated mom Janet Gretzky's birthday on the weekend (what, no Golden Globes 2014 invitation?) wearing one of the most revealing non-bikini outfits we've ever seen and shared photos of the event on Instagram, natch.

Surrounded by Canadian legend Wayne Gretzky, mom Janet and fiance Dustin Johnson, the Maxim cover girl gave us her best Valley Girl pose wearing tiny leather shorts (which look familiar) and a black bustier top with a low V-neck.

"Happy Birthday Mom @janetgretzky we love you so much!!!" the blond babe wrote, before posting another Instagram snap which showed her flanked by her gorgeous mom (a former Playboy cover girl) and younger sis, Emma.

Janet also posted a few Instagram photos of her own, including a sweet pic of the whole Gretzky clan gathered together which showed Paulina in a surprisingly modest long sleeved, high-neck top.

But we have to ask: Did Wayne approve of his little girl's revealing outfit? And does he know about her No. 99 tattoo?

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    Paulina in a Golf Digest photo shoot.

  • Paulina Gretzky's Golf Digest Cover

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  • Paulina Gretzky walks down towards the 18th green to see her fiance golfer Dustin Johnson finish up his third round of the Tournament of Champions golf tournament, Sunday, Jan. 5, 2014, in Kapalua, Hawaii.

  • Paulina Gretzky walks down towards the 18th green to see her fiancé golfer Dustin Johnson finish up his third round of the Tournament of Champions golf tournament, Sunday, Jan. 5, 2014, in Kapalua, Hawaii.

  • Paulina Gretzky is seen near the 18th fairway during the first round of the Tournament of Champions golf tournament, Friday, Jan. 3, 2014, in Kapalua, Hawaii. Gretzky, daughter of hockey great Wayne Gretzky, is engaged to golfer Dustin Johnson who is playing in the tournament.

  • Paulina Gretzky watches the play of Dustin Johnson during round one of the Hyundai Tournament of Champions at the Plantation Course at Kapalua Golf Club on January 3, 2014 in Lahaina, Hawaii.

  • Paulina Gretzky watches the play of Dustin Johnson during round one of the Hyundai Tournament of Champions at the Plantation Course at Kapalua Golf Club on January 3, 2014 in Lahaina, Hawaii.

  • Paulina Gretzky watches the play of Dustin Johnson during round one of the Hyundai Tournament of Champions at the Plantation Course at Kapalua Golf Club on January 3, 2014 in Lahaina, Hawaii.

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  • Paulina Gretzky, Ciara

    Paulina Gretzky, left, and Ciara present the award for favorite male artist - soul/R&B at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (Photo by John Shearer/Invision/AP)

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    Paulina Gretzky at the 2013 American Music Awards

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    Paulina Gretzky and Justin Timberlake at the 2013 American Music Awards

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    Paulina Gretzky and Dustin Johnson at the 2013 American Music Awards

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    Paulina kisses Dustin Johnson after he won the HSBC Champions tournament.

  • WGC - HSBC Champions: Day Four

    SHANGHAI, CHINA - NOVEMBER 03: Paulina Gretzky watching Juston Johnson of the USA during the final round of the WGC - HSBC Champions at the Sheshan International Golf Club on November 3, 2013 in Shanghai, China. (Photo by Ross Kinnaird/Getty Images)

  • Dustin Johnson, Paulina Gretzky

    Dustin Johnson of the United States, left, and his fiancee Paulina Gretzky, right, embrace after winning the HSBC Champions golf tournament at the Sheshan International Golf Club in Shanghai, China, Sunday, Nov. 3, 2013. (AP Photo/Eugene Hoshiko)

  • WGC - HSBC Champions: Day Three

    SHANGHAI, CHINA - NOVEMBER 02: Paulina Gretzky follows the play of Dustin Johnson during the third round of the WGC-HSBC Champions at the Sheshan International Golf Club on November 2, 2013 in Shanghai, China. (Photo by Scott Halleran/Getty Images)

  • WGC - HSBC Champions: Day Three

    SHANGHAI, CHINA - NOVEMBER 02: Paulina Gretzky follows the play of Dustin Johnson during the third round of the WGC-HSBC Champions at the Sheshan International Golf Club on November 2, 2013 in Shanghai, China. (Photo by Scott Halleran/Getty Images)

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    Paulina Gretzky, partner of Dustin Johnson of the USA nurses a Joey during day two of the Perth International at Lake Karrinyup Country Club on October 18, 2013 in Perth, Australia. (Photo by Matt King/Getty Images)

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    Dustin Johnson of the USA nurses a Koala with his partner Paulina Gretzky as she nurses a Joey during day two of the Perth International at Lake Karrinyup Country Club on October 18, 2013 in Perth, Australia. (Photo by Matt King/Getty Images)

  • Paulina Gretzky

    Paulina Gretzky, partner of Dustin Johnson of the USA nurses a Joey during day two of the Perth International at Lake Karrinyup Country Club on October 18, 2013 in Perth, Australia. (Photo by Matt King/Getty Images)

  • Paulina Gretzky watches the play of Dustin Johnson during the final round of the TOUR Championship by Coca-Cola at East Lake Golf Club on September 22, 2013 in Atlanta, Georgia.

  • Paulina Gretzky watches the play of Dustin Johnson during the final round of the TOUR Championship by Coca-Cola at East Lake Golf Club on September 22, 2013 in Atlanta, Georgia.

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  • Paulina Gretzky follows the play of Dustin Johnson during the second round of The Barclays at Liberty National Golf Club on August 23, 2013 in Jersey City, New Jersey.

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    A close-up of Paulina Gretzky's engagement ring.

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    Paulina Gretzky and Dustin Johnson celebrate their engagement.

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    Paulina Gretzky and Dustin Johnson at Wayne Gretzky's in Toronto.

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