Beyoncé Giselle Knowles (Carter?)

Both an award-winning single-named singer and a talented actress, Beyonce has done relatively little genre work, but what she has done has been attention-grabbing!
Curiously, though her non-genre acting had been in "serious" films like Cadillac Records and DreamGirls, her genre movie work had only been in comedies...until Obsessed!

Genre appearances... 
Obsessed (Sharon Charles)

Austin Powers in Goldmember 
 (Foxxy Cleopatra, also performed song on soundtrack)
The Pink Panther
(Xania, also performed songs on soundtrack)
Pepsi Commercial "Dare for More: Gladiators"
(Gladiator, also performed song)

Check out...
The Official Beyonce HomePage
BeyonceWorld (FanPage)