Beyonce & Destiny's Child

Though they've been through three different combinations, from 2001 on, the group has been Beyonce Knowles, Michelle, and Kelly.
Though each has pursued solo projects, they still still reunites from time to time as Destiny's Child, as shown last night at the Super Bowl!

Maya Khabira Rudolph

You don't think "science fiction / fantasy" when you think of multi-talented Saturday Night Live alum Maya Rudolph.
Why not?
Currently appearing in BridesMaids, she hasn't done much genre, but what she's done recently has been either top-billed or featured player!
But perhaps her biggest Fantastic Femme credit was her uncanny ability to impersonate other Fantastic Femmes including Halle Berry, Lucy Liu, Beyonce, Vanessa Hudgens, and Whitney Houston during her tenure on SNL!
Trivia:
One of Maya's closest friends is Gwyneth Paltrow, whom she's known since grade school!
Maya is the daughter of legendary soul singer Minnie Riperton. Her greatest hit, "Lovin' You", was conceived and written by Minnie as a lullaby for baby Maya!

Genre appearances include...
Shrek Forever After / Shrek the Third (Rapunzel)
The Simpsons "Homer of Seville"
Idiocracy (Rita)
Devil's Child (Holly)
Gattica (Delivery Nurse)

Check out...
her bio on Saturday Night Live's Official Site

Other actresses to play Rapunzel include...
Mandy Moore in Tangled
Tereza Srbova in InkHeart
Emma Rose Lima in Enchanted
Kelly Sheridan in Barbie as Rapunzel
Tress MacNeille in The Simpsons "Treehouse of Horror XI"
Louise Robey in Play Nice
Pamela Winslow in Into the Woods
Stephanie Walski in Pee Wee's PlayHouse
Shelley Duvall in Shelley Duvall's Faerie Tale Theatre "Rapunzel"
Carol Lynley in Shirley Temple's StoryBook "Rapunzel"

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)