Justin Bieber, Rihanna And Others Tweet About Pre-Grammy Activities

Grammy-nominated stars tweet about bum-rushing theaters and getting freaked out by Sunday's awards.

The Grammys are going down Sunday night, but in the days beforehand, many of the stars up for hardware have been tweeting about their antics. Some missives were related to the big show, others were just in good, clean superstar fun.

Cee Lo, who is up for four mini gramophones — including Record of the Year, Song of the Year, Best Urban/Alternative Performance and Best Short Form Music Video — tweeted on Friday about getting a luxurious lift from one of his megastar pals in order to arrive at his destination in timely fashion.

"Yo yall might not believe me but steven Spielberg is letting my use his private jet to get to san diego on time!" the Lady Killer wrote. "Its nice to have friends."

Grammy newbie Justin Bieber, who is in the running for two awards, including the coveted Best New Artist trophy, is also spending the weekend celebrating the release of his documentary, "Justin Bieber: Never Say Never." The teen sensation also decided to add the element of surprise to his 3-D flick by dropping in on some lucky moviegoers.

"About to surprise another theatre with the crew!!" he wrote. "U support us so we support u. Thank U! Let's shock the world #NSN3D."

Indie darlings Arcade Fire also unleashed a surprise on their fans Friday night by playing a last-minute, 500-ticket secret show. The collective, which is up for trophies like Album of the Year and Best Rock Performance by a Duo or Group With Vocals, worked well-worn hits and insta-classics and even got a legendary street artist to helm the wheels of steel, tweeting on Friday afternoon, "Shepard Fairey will be DJ'ing before set tonight in LA."

Rihanna, on the other hand, apparently spent her Saturday helming her own low-key shindig. The songstress, who will hit the stage and whose Eminem collabo "Love the Way You Lie" is vying for Best Rap/Sung Collaboration and Best Rap Song, replied to a fan who asked her what's up, saying that she's "just shakin my ass in the mirror." The singer also conceded to some pre-show jitters.

"I CAN'T STOP thinking about tomorrow!!!" she replied to another fan. "#AnxietyF--------!!!!!!!"

Don't miss "Snooki & Sway: Live From the Grammys," a red-carpet live stream kicking off Sunday at 6 p.m. ET on MTV.com. And stick with us all Grammy night for coverage of the red carpet, the show, the afterparties and beyond!