Lady Gaga's personal trainer says she is ''very healthy.''

The 29-year-old singer recently attracted some criticism after showing off her curvy figure in a barely there bikini in the Bahamas, but fitness guru Harley Pasternak insists she is still very fit and is ''not someone who really ever let herself go.''

The 40-year-old celebrity trainer said: ''I think she loves her body. Historically she's someone who is always fit, but she's not someone who really ever let herself go.''

Harley also claims the 'Born This Way' hitmaker isn't stressed about losing weight ahead of her upcoming wedding to fiancé Taylor Kinney, who she got engaged to in February after four years of dating.

He told the New York Post's Page Six: ''When she's mentally focusing on something creative, there's nothing she can't do. She's someone who likes to eat well and she loves her healthy versions of Italian food, her salads and her Japanese food -- she's a very healthy person.''

Lady Gaga was forced to cancel her tour in 2013 after injuring her hip and was forced to use a wheelchair, and Harley admits she hated not being able to go to the gym.

He said: ''[Gaga] couldn't exercise for an extended period of time [when she was injured], so her body looked different. She felt bad about that, but when she was back to being physically active again, she got really fit.''