Britney to give Pepsi £5.7m Super Bowl boost

Britney Spears is to swap her sexy outfits for demure dresses when she appears on America's most expensive television advertisements.

She will appear in Pepsi advertisements for 90 seconds in the breaks during the Super Bowl next month.

Britney will receive a big proportion of the £5.7m (€9.3m) cost of the adverts - which work out at more than £63,000 (€103,000) per second.

Instead of showing her midriff, she will dress more modestly in the two slots which show her starring in American Pepsi advertisements from the 1950s to the present.

The video features her wearing period outfits and singing jingles from the 1950s, 1960s, 1970s and 1980s, starting in black and white and moving to colour.

Internet users are to choose between two 30-second videos representing the present day, although Britney will be dressed in a fringed outfit from head to toe in both.

The Super Bowl ads are the most expensive slots on US television, and are watched by the biggest audiences of the year.

This year, Paul McCartney will perform live at the game, which is taking place in New Orleans under tight security following the September 11 terror attacks.

Advertising expert Michael Wolf said that Pepsi is putting as much effort into its commercials, which would have to be just as entertaining.

"Consumers really do expect entertainment from the commercials," Mr Wolf said. "They want to be back to normal and feel like they are going to get the usual kind of Super Bowl experience."