The singer, 24, known for her wacky outfits, was on her fella’s shoulders fighting a pal when her bikini top slipped.
She spent the rest of the day leaping and larking about – and embracing her barman boyfriend Luc Carl at a hotel in Houston, Texas, US.
GaGa recently got back with “first love” Luc, a budding rocker.
An onlooker said: “They had a great time, kissing and cuddling. They looked so happy.”
But she still managed to get out on her own, have a few drinks and have her picture taken with fans. Fans that will, hopefully not go down the same route as the ever so pretentious Gaga.