Kelly Clarkson's Impressive Musical Performances in L.A. Concert.

Kelly Clarkson celebrated her 41st birthday by performing all 14 songs from her new album "Chemistry" at a concert in LA. The album, which took three years to make, is about her feelings regarding her divorce and includes both sad and upbeat songs. Clarkson was nervous about releasing the album but was encouraged by a crew member who said she had "nailed" the emotions of loss and grief. The concert was filmed for future use, and there are no plans yet for how it will be released to the public.