47'
Mistake by Messi as he gives the ball away, Lampard finds Ramires over the top and he breaks down the left and into the area - Ramires looks certain to shoot but picks out Drogba with a fine pass across the box and he cannot miss.
47'
And that's half-time!
Sucker punch for Barca. The Chelsea fans cheer their team off after Drogba's shock goal - the Blues had not troubled Valdes.
Barca have dominated possession and wasted some glorious chances - so this game is far from dead.