The Brits flipped their lids last night when Carl Barat joined Pete Doherty for 12 Libs songs and a Mama Cass & The Mamas And Papas cover during the An Evening With Pete Doherty show at the Hackney Empire. NME clearly (and understandably) was (hotly) tipped off to the event, offering up a breathless liveblog (sample entry: "Carl said 'hello.' ...