Lady GaGa thinks she's got ''really fat''.

The singer - who has admitted her weight fluctuates because of her love of Italian food - has been gorging on barbecue food and meat during her stay in Austin, Texas, and worries she has put on weight.

Explaining her floaty Gareth Pugh dress during an interview with Jimmy Kimmel at the South by Southwest festival, she confessed: ''That's actually why I wore it because I am really fat right now because I have been eating BBQ. I had some at Stubb's because I am playing there and some Salt Lick too. Or any meat that I find on the street, I just eat.''

Gaga has been soaking up the atmosphere at the festival, where she will deliver the SXSW keynote speech with Fuse's John Norris today (14.03.14), even though she doesn't remember much from the live sets she's watched so far.

The 27-year-old star - who previously admitted to being addicted to marijuana - said: ''I have had a really great time. I have been going out every single night and seeing as much music as I can. The thing I have missed the most is going out and seeing live music. I don't remember a lot of what happens but I know I was there and I have seen live music.''

The eccentric superstar also praised her loyal fans, her Little Monsters, for going to extreme lengths to get close to her, with some lucky fans winning tickets to see her perform at Stubb's.

She added: ''I saw some videos on Instagram of them jumping off buildings to get tickets, but that's the kind of fans I have and I'm a lucky girl.''