Photos of John Mayer, Taylor Swift, LL Cool J at Grammy Nominations Concert Live Rehearsal in LA

John and Taylor Prep the Grammy Nomination Stage

John Mayer took a break from baking to strum his guitar and pose with B.B. King at the Grammy Nominations Concert rehearsals in LA yesterday. Taylor Swift and LL Cool J practiced their co-host duties before Mariah Carey joins them on stage tonight. The show airs live tonight and spices up the usual nomination announcements with performances by a number of artists as everyone gears up for the Grammy Awards in February.

To see more photos of John, Taylor and others just read more.