The work behind International Women's Day is no small feat, and represents the lifetimes of effort women have put into building a better present and future. Search the hashtag #IWD2012 on Twitter and you'll see that people are talking about Women's Day -- including many of those well-known faces love to follow.

With IWD participants in 94 countries, women across the globe marched, rallied, celebrated and remembered. No gesture was too small, with some even giving up makeup to honour the fight for women's rights and lives. And while not everyone could take the time to take part in some of the day's 1,600 events, there was enough time to commemorate women in 140 characters or less. Here's what some famous voices in the Twitterverse had to say today:

American journalist Maria Shriver:

@mariashriver
Maria Shriver

Happy International Women's Day. Women, take a moment today to applaud all that you do.

March 8, 2012 6:15 pm via Twitter for iPhone Reply Retweet Favorite

Celebrity Chef Padma Lakshmi:

@PadmaLakshmi
Padma Lakshmi

Happy international women's day!!! Support the women you love: http://t.co/tBdosijb

March 8, 2012 5:01 pm via web Reply Retweet Favorite

And singer Keri Hilson:

@KeriHilson
Keri Hilson

International Women's Day!!! Every man in the world should be bowing down to God's greatest creation!! Thas right!

March 8, 2012 4:30 pm via UberSocial for BlackBerry Reply Retweet Favorite

Meanwhile, in Canada, here's what some of the local personalities were talking about:

Leader of The Green Party of Canada:

@ElizabethMay
Elizabeth May MP

Happy International Women's Day! Keep working for real equality. #cdnpoli #GPC

March 8, 2012 11:14 am via Twitter for BlackBerry® Reply Retweet Favorite

Leader of the New Democrat Party:

@nycole_turmel
Nycole Turmel

Celebrating women today - how far we've come, and our unwavering determination to achieve equality. http://t.co/0qmxVBLA #cdnpoli #ndp

March 8, 2012 3:17 pm via TweetDeck Reply Retweet Favorite

Canadian author and social activist, Naomi Klein:

@NaomiAKlein
Naomi Klein

#HappyInternationalWomensDay On Feb 14, 2013 I'm joining #1billionrising to end violence agnst women&girls! http://t.co/yWOd7xAz

March 8, 2012 2:22 pm via web Reply Retweet Favorite

It wasn't only women reminding everyone about the significance of March 8th:

UK Prime Minister David Cameron also announced he'd be creating legislation to end sexual harassment

@Number10gov
UK Prime Minister

Photo: PM at #IWD reception: "important steps" are being taken on violence against women. #WomensDay http://t.co/9oRpZPIc

March 8, 2012 11:32 am via Photos on iOS Reply Retweet Favorite

Musical artist Pitbull:

@Pitbull
Pitbull

Happy International Women's Day to all the sexy, powerful, sassy, classy women all over the world. daleeee!!!!!

March 8, 2012 3:56 pm via web Reply Retweet Favorite

And on-air personality, Ryan Seacrest:

@RyanSeacrest
Ryan Seacrest

"A woman can say more in a sigh than a man can say in a sermon" - Arnold Haultain...so true. Happy int'l women's day :)

March 8, 2012 9:18 pm via web Reply Retweet Favorite

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