There's a reason the tagline for the O Music Awards is "offbeat, outrageous, online." And for its second edition this year, MTV's signature online awards show will once again attempt to make history, this time by hosting the longest dance party in history.

The 55-plus-hour dance-a-thon will be live-streamed at OMusicAwards.com and should wrap up just before the main show kicks off at 11:30 p.m. ET on Halloween (October 31), hopefully with a new Guinness World Record in hand. The stunt is a sequel to the record set earlier this year at the inaugural O Music Awards, where Chiddy of Chiddy Bang went deep to set the Guinness World Record for the Longest Freestyle Rap.

It was also revealed on Wednesday (October 5) that after taking over the Strip in Las Vegas last time, the show will roll into Los Angeles beginning October 29, when the dance record attempt will kick off at the Roxy Theatre on the Sunset Strip. The dance marathon won't just be for bragging rights, either, as it will aim to raise awareness for LGBT youth issues, especially bullying, by giving fans a chance to donate to a number of organizations during the stream.

Among the groups that will benefit from the record attempt are: GLSEN (the Gay, Lesbian & Straight Education Network), It Gets Better, the Gay Straight Alliance Network (GSA), Human Rights Campaign (HRC) and GLAAD (Gay & Lesbian Alliance Against Defamation). Viewers will also be able to use social media to support the cause and cheer on their favorite dancers.

The current record for longest dance party was achieved in October 2006 by Unique Events Limited in Ireland and began with 40 dancers, with 31 still standing after 55 hours.

The second edition of the show will feature new categories courtesy of user suggestions.

Among the five new user-generated categories are "Oops! I Did It Online," in which oversharing celebs such as Sinead O'Connor and T-Pain will face off against the Game and Courtney Love; and Best Artist With a Cameraphone, which pits Demi Lovato against Justin Bieber, Young the Giant, Katy Perry, the Deftones and Shiny Toy Guns. The other new categories include Best Web Born Artist (MNDR, Odd Future, the Weeknd), Best Vintage Viral Video (Metallica, Nirvana, Notorious B.I.G., O'Connor) and Best Lyrics Video (Perry, Joe Jonas, Lenny Kravitz, Christina Perri).

The O Music Awards 2 will unfold on Halloween on OMusicAwards.com, as well as MTV.com, VH1.com, CMT.com, LogoTV.com and MTVHive.com. Fans can vote for their favorites and get updates at OMusicAwards.com.