Album / CD art cover titled "Stronger " by Kelly...

Album / CD art cover titled "Stronger " by Kelly Clarkson Credit: None/

Kelly Clarkson is stretching again on "Stronger" (RCA). After consolidating all her pop prowess on her irresistible 2009 album, "All You Ever Wanted," she is trying her hand at a variety of genres -- from the acoustic country ache of "Breaking Your Own Heart" to the four-on-the-floor dance-floor stomper "What Doesn't Kill You." She handles it all very well, infusing her tales of empowerment after a breakup with her unique combo of vulnerability and sass. Clarkson is best at the pop put-down, though, and she has a doozy in "Einstein," where she declares, "I may not be Einstein, but I know dumb + dumb = you."

"Stronger"

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Kelly Clarkson is stretching again on "Stronger" (RCA). After consolidating all her pop prowess on her irresistible 2009 album, "All You Ever Wanted," she is trying her hand at a variety of genres -- from the acoustic country ache of "Breaking Your Own Heart" to the four-on-the-floor dance-floor stomper "What Doesn't Kill You." She handles it all very well, infusing her tales of empowerment after a breakup with her unique combo of vulnerability and sass. Clarkson is best at the pop put-down, though, and she has a doozy in "Einstein," where she declares, "I may not be Einstein, but I know dumb + dumb = you."

KELLY CLARKSON

"Stronger"

THE GRADE A-

BOTTOM LINE Masterfully covering all her bases