Justin Bieber, B.o.B To Perform At 2010 VMAs

Ke$ha and Ashley Greene join the star-studded presenters list for the live show on September 12.

One is a teen pop phenomenon known for inducing Beatles-level hysteria in his fans, the other, a free-spirit Atlanta MC whose debut album suddenly shot to pop success. Now, Justin Bieber and B.o.B are set to hit the stage as performers at this year's 2010 MTV Video Music Awards. Bieber and B.o.B join already announced performers Kanye West, Drake and Florence and the Machine.

Four-time nominee Ke$ha and "Twilight" star Ashley Greene will also be among the night's presenters when the show goes live on September 12 from the Nokia Theatre in Los Angeles. The night will mark the first VMA performances for both Bieber (who presented at last year's ceremony) and B.o.B.

"I'm excited to be performing at the VMAs. It is all still unbelievable, because last year I went for the first time and no one knew who I was," said Bieber, who's nominated for Best New Artist. "Just really shows that dreams can come true and what incredible, dedicated fans I have. I'm a lucky guy and grateful. Now I just want to get on that stage, have some fun in front of my heroes, because at the end of the day I'm still a kid and still a fan."

B.o.B is up for five Moonmen, including Video of the Year and Best Male Video.

"It's very special to me. I think it's a lot more special than the success of the singles, because this reflects the work I've put in over the years and the word of mouth I've helped create," B.o.B recently told MTV News about his nominations. "It's definitely amazing. I'm trying to find the words to explain it, but I can't. It's inexplicable. I'm a real simple man, so, you know, I accept every gift with generosity and gratitude."

Other previously announced presenters include Nicki Minaj, Emma Stone, Penn Badgley, Trey Songz, Selena Gomez and Ne-Yo. Additional performers and presenters, as well as the VMA host, will be announced in the weeks to come.

Bieber recently shot a new VMA promo in which he made like the Beatles, with a group of rabid female fans chasing after him — something he had no issues with. "I'm kind of like the Beatles running, and there's girls chasing after me," he said about the retro-flavored promo. "I like girls chasing me, so it's good."

What do you want to hear Justin and B.o.B perform? Share your wish list with us in the comments!

The 27th annual MTV Video Music Awards will be broadcast live from the Nokia Theatre in Los Angeles on September 12 at 9 p.m. ET.