Britney Spears` beau tells her to clean up her act

Britney Spears with her boyfriend Jason Trawick arriving at JFK airport in New York City. - Ron Asadorian/Splash

Brtiney Spears' boyfriend Jason Trawick has urged the singer to clean up her act and to wear clean clothes and wash her hair more, according to reports.

Trawick is said to have been infuriated by his flame's habit for re-wearing the same clothes for several days and seldom washing her blonde locks.

On a recent occasion he allegedly even refused to go out in public with the Toxic singer until she changed out of a grubby dress.

'Recently she put on a sundress for the third day in a row, but Jason refused to leave the house with her until she put on something else,' a source said.

'She hates washing her hair, so sometimes it can smell downright sour. She'll sometimes grab an outfit and wear it two or three times in a week.”

'Britney isn't the type to cover herself in pretty smelling lotions,' the source explained.

But according to friends of the 28 year old, Spears' regime is nothing new.

'It's just plain laziness. She was the same when she was married to Kevin Federline,' the source added to Heat magazine.