"I love being happy. I'm not Precious," actress Gabourey Sidibe crooned

cheekily during her monologue as host of this week's "Saturday Night

Live," featuring musical guest [artist id="2552793"]MGMT[/artist].

The Academy Award-nominated star of [movie id="415966"]"Precious: Based on the Novel

'Push' by Sapphire"[/movie] took to the Studio 8H stage to perform a

doo-wop-style opening number, making light of the confusion between her

and the downtrodden character she portrays in the film. "Movies are not

real life. That's something you should know," she sang, adding, "Mariah

Carey doesn't have a mustache."

The 26-year-old then sped through a hodgepodge of largely loud-mouthed

and irritated characters. She donned dreadlocks to play a Jamaican

nurse hawking a heal-thyself manual opposite Kristen Wiig's Suze Orman.

She yelled at kids on her front stoop as an elderly, know-it-all

neighbor whose daddy used to sell "Wikipedias." And she competed at the

"2010 Public Employee of the Year Awards" as a surly St. Louis DMV

worker.

Sidibe also teamed up with

href="http://hollywoodcrush.mtv.com/2010/04/22/gabourey-sidibe-snl-promos

/">Andy Samberg, with whom she appeared in promos earlier in the

week, for the Digital Short "Cherry Battle." The pair, clad in Obi-Wan

Kenobi-style getups, spit cherries at each other in slow motion.

Brooklyn-based MGMT performed

two songs off their recently released [article id="1633933"]sophomore album, Congratulations.[/article] First up

was "Flash Delirium," a tune the band released digitally March 9 to

tease the new album. They followed that up with "Brian Eno," an ode to

the British musician and producer.

"It's kind of a vampire-punk-rock song about finding Brian Eno in like

a cathedral in Transylvania," singer Andrew VanWyngarden told

href="http://nymag.com/arts/popmusic/features/61880/"

target="_blank">New York magazine last year. "He's like a

dark wizard. We originally asked him to produce the track, but he

hadn't heard of us."

The band is currently on tour and will play at May's [article id="1631916"]Sasquatch festival[/article] and August's

Lollapalooza.

The next new episode of "SNL" airs May 8 with host [article id="1637198"]Betty White and musical guest Jay-Z[/article]. The "Golden

Girls" star landed her hosting gig thanks to a fervent Facebook

campaign launched earlier this year encouraging producer Lorne Michaels

to have White on the show.