Mario Lopez has signed on to host a new MTV reality series called Top Pop Group this Fall.

Top Pop Group will feature nine unsigned music groups competing for a $100,000 grand prize.

Celebrity coaches will mentor the groups; helping them perfect their sound and dance moves, while a panel of celebrity judges give the groups feedback ala American Idol. Home viewers will vote for their favorites and name the official “Top Pop Group” each week.

CNN Showbiz Tonight commentator Marianela Pereyra will co-host.

Top Pop Group premieres September 11 at 10 p.m. on MTV. Tune in for a seriess casting special on August 28 at 9 p.m.