David Gilmour at "The Wall"

Last night at the O2 Stadium in London, Pink Floyd singer and guitarist David Gilmour made a surprise appearance singing "Comfortably Numb" at Roger Waters' "The Wall" show, and Kipp Lennon harmonized with him.

At the end of the show, Gilmour and Floyd drummer Nick Mason joined Waters, as well as Kipp, Mark and Pat for "Outside the Wall."

Then this morning, Kipp called into the Mark & Brian radio program, on 95.5FM KLOS, and told the whole story.