Britney Spears is "nervous" about her MTV Video Music Awards comeback on Sunday.

However, it leaves out footage of her last performance in 2007, after which she was slammed for being out of shape, slow on stage and dancing like a "bad stripper".

Asked how she's feeling about her upcoming VMA show, the star said: "I still get very nervous [about the awards]. You're not alive [if you don't]. I'm very alive."

Meanwhile, Britney took part in James Corden's Carpool Karaoke earlier this week and revealed in the interview with radio station 103.5 KTU that The Late Late Show host was "incredibly sweet" on and off camera.

She said: "The guy was just so incredibly sweet .?.?. He controlled the whole thing, and sometimes I got onto him and said, 'I don't want to hear that song again.' They didn't show that part."

During the segment, the 'Piece of Me' singer - who has 10-year-old son Sean and nine-year-old Jayden with her ex-husband Kevin Federline - also admitted she's "done" with men.

She said: "I think I might not do the whole men thing anymore. I won't do the men thing, or get married, I'm just done with men.

"I might french kiss someone but I'm not going to marry anyone - I don't believe in marriage any more."