The performances kept coming: Kelly Clarkson did "My Life Would Suck Without You" and rather blew the doors off the joint, then reminded us all she came from a karaoke show with a great but unnecessary rendition of Janis Joplin's "Piece of My Heart." (P.S.: Brace yourselves for a Jessica Simpson-style uproar about Clarkson's weight, coming soon to a tabloid near you.)
-Whitney Pastorek (EW's PopWatch)

There also was Kelly Clarkson, whose disagreement with Davis and her record label about her under-appreciated 2006 rock album, "My December," seems to have been wholly forgiven now that her candy-sweet new single, "My Life Would Suck Without You," is selling like crazy. Clarkson showed characteristic sass pushing that song, but she still burns a torch for harder music: She really got down performing a song Davis brokered in an earlier era, Janis Joplin's classic rocker "Piece of My Heart."

Houston's mini-concert put an exclamation point on a night that included a rousing performance by Kelly Clarkson,

....

Clarkson got one of the evening's biggest ovations with her performance of her new single, "My Life Would Suck Without You" and the Joplin gem "Piece of My Heart.