In her own attack advert, which was paid for by the US comedy website Funny or Die, Hilton derided 71-year-old Mr McCain as being "a wrinkly, white-haired guy" from the "olden days", compared him with Star Wars' Yoda and the Golden Girls, and said he was "old enough to remember when dancing was a sin and beer was served in a bucket".

The 27-year-old model and actress also said she was "not promising change like that other guy", Mr Obama.

The spoof advert comes after Mr McCain compared Mr Obama with Hilton and Britney Spears in an advert last week, suggesting the 47-year-old Illinois senator was no more than a celebrity candidate who was not ready to lead America.

Hilton, who appears in a swimsuit reclining by the side of a pool in her advert, said: "Hey America, I'm Paris Hilton and I'm a celebrity, too.

"Only I'm not from the olden days and I'm not promising change like that other guy. I'm just hot. But then that wrinkly, white-haired guy used me in his campaign ad, which I guess means I'm running for president. So thanks for the endorsement white-haired dude."

She mocked the Republican's advert and also proposed her own solution to America's energy crisis, a key issue ahead of November's general election. Hilton said that a "hybrid of both candidates' ideas" to solve the energy crisis would be the best solution for the US.

"Limited offshore drilling, with strict environmental oversight, while creating tax incentives to get Detroit making hybrid and electric cars. Energy crisis solved! I'll see you at the debates.

"Now if you'll excuse me I have to go pick out a vice president, I'm thinking Rihanna. I'll see you at the White House. Oh, and I might paint it pink. I hope that's OK with you guys. Bye."

After blowing a kiss to the camera, she ends: "I'm Paris Hilton, and I approved this message because I think it's totally hot."



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