This is Orianthi Panagaris. She is a pop singer/guitarist now, but before that she played a lot of Santana esque songs, and actually played with santana himself. She was the guitarist for Michael Jackson's new tour before he passed away. This is a video of her playing with Santana at the PRS 20th Anniversary Party.
If you liked her playing I would recommend you also check out here acoustic cover of Michael Jackson's "Give In To Me"