Whitney Houston pulled out the big guns for her first album since 2002 – the diva belts out tracks written by Alicia Keys (“Million Dollar Bill”), Diane Warren (“I Didn’t Know My Own Strength”) and R. Kelly (“Salute”). Akon even lends vocals on the island jammer “Like I Never Left.” But does that mean Houston’s stunning – yet slightly weathered – singing chops don’t take center stage on her latest disc? Hell to the no.