Comments: Inside an empty O2 Arena hours before the regularly scheduled I+E tour show tonight, Bono and Edge perform "Two Shots Of Happy, One Shot Of Sad" on the e-stage. Edge plays piano and they're accompanied by an eight-piece string section. While fans hearing it outside excitedly hope it's a soundcheck for the evening's concert, it's actually being recorded for Sinatra 100, a CBS-TV special celebrating what would've been Frank Sinatra's 100th birthday. The TV show airs on December 6th.