Sure, the big show happens on Sunday night, but before the 2011 Video Music Awards kick off officially, MTV is throwing two star-studded concerts to get the party started.

On Friday, Swizz Beatz, Chiddy Bang and Wallpaper will perform at the Taco Bell Presents the MTV2 VMA Concert, with Jessie J — our 2011 VMA House Artist — hosting the event.

If you aren't lucky enough to be in attendance at the Los Angeles show, you can still check out footage from the event. MTV2's "Sucker Free" will be filming on site with guests Swizz Beatz and Chiddy Bang, and the episode is set to air Sunday at 11 a.m., with a special encore airing at 11 p.m. ET, right after the VMAs.

Then on Saturday, Cobra Starship, Joe Jonas and Miguel are set to perform at mtvU's VMA Concert to Benefit Lifebeat - Music Fights HIV. Cobra Starship, along with special guest Sabi, will perform their track "You Make Me Feel" during the black carpet VMA Pre-Show.

Can't make it to the mtvU Lifebeat show? Not a problem. MTV.com, in partnership with the Capital One Journey Card, is exclusively presenting live-stream performances by Joe Jonas and Miguel beginning at 9:30 p.m. PT on Saturday. During the show, fans can use their Facebook and Twitter accounts to chat about it. And after the show, select full length performances will be available on-demand at vma.mtv.com.

"MTV supports so many great causes, and we're beyond grateful that they've made Lifebeat a part of VMA weekend again this year," Lifebeat Executive Director Ben Wymer said in statement. "We're looking forward to an amazing event and raising lots of funds for HIV/AIDS prevention and support."

The 28th annual MTV Video Music Awards will air live Sunday, August 28, from the Nokia Theatre in Los Angeles at 9 p.m. ET/PT, following the Selena Gomez-hosted pre-show at 8. See the list of nominees, revisit last year's highlights and vote for Best New Artist by visiting VMA.MTV.com.