Angry fans booed Lady Gaga after she arrived more than an hour late for a public appearance and then dashed indoors before many had even caught a glimpse of her.
Hundreds of screaming fans crammed the streets around luxury department store Harrods ahead of the UK launch of her new perfume, Lady Gaga Fame.
But many were left disappointed after she refused to walk the full length of a themed black carpet, and then went inside before some had even caught sight of her.
Luke Reader (18), from central London, said: "It's quite ironic it's called Fame because it just shows how much fame has changed her.
"She couldn't even spend five minutes talking and having some pictures taken. It's not on."
Alex George (18), from Islington, north London, waited almost three hours to see Lady Gaga and described the event as "a bit of a let down".
She said: "I'm obviously annoyed. She was late and I thought she would sign autographs and I'd be able to get a picture."
Lady Gaga's fans held black and gold balloons and sang a number of her hits as they waited for the star.
She was due to arrive at the event in Knightsbridge at 7.45pm last night but it was 8.45pm before she turned up.