Glu says it signed a 5-year deal with Spears with the possibility of a 3-year extension. The game will feature Spears's likeness, voice and "creative influence" and will be launched in the first half of 2016.
Separately, Glu says online game and social media operator Tencent Holdings of China will buy 21 million of its shares for $6 each, or $126 million. This will give Tencent ownership of 14.6 per cent of Glu's shares, making it its largest shareholder.
Kardashian's game, "Kim Kardashian: Hollywood!" proved very successful, helped by the popularity of the reality-TV star.
Glu Mobile shares surged 24 per cent in extended trading to $6.69.