Mick's presenting with Colbie Caillat and I believe his nominated category is during the pre-telecast:
http://www.grammy.com/live
Stay tuned throughout each day and night of GRAMMY Weekend. In addition to our exciting live content schedule, we’ll be running exclusive video of past GRAMMYs, interviews with music legends, and much more 24/7 leading up to Music's Biggest Night, the 52nd GRAMMY Awards!
All times PT
Sunday, Jan. 31
12:30 p.m.: Pre-Telecast red carpet
1 p.m.: Pre-Telecast Awards
3:45 - 5 p.m.: GRAMMY red carpet
5 - 8 p.m.: Behind-the-scenes during the 52nd Annual GRAMMY Awards
8 - 9:30 p.m.: GRAMMY Celebration (after-party), featuring Ne-Yo and Sam Moore