Britney Spears is winning in the high-street battle between her fragrance and Paris Hilton's.

Both Spears and Hilton have perfumes on the market and a source told the New York Post that the toxic singer's offering "kicked Paris Hilton's butt." Hilton is said to be "extremely upset" by the poor sales.

Britney's Curious was launched by Elizabeth Arden, and Paris' Paris by Parlux.