What to watch for at the Grammys

Yes, some awards are given away at the Grammys, but the most exciting part of the evening is always the performances. The 57th annual Grammy Awards looks to be all about the duets and group performances with Lady Gaga and Tony Bennett pairing up as well as Common and John Legend, Hozier and Annie Lennox, Mary J. Blige and Sam Smith, Beck and Coldplay's Chris Martin, and Tom Jones with Jessie J. There will also be trio and group performances including Rihanna, Kanye West and Paul McCartney, as we