Britney Spears' recent Elle magazine shoot came to an, er, sticky end, according to a new report.

Things reportedly didn't go entirely to plan when the singer posed for the glamourous photoshoot during a break from her current Circus tour.

"They dressed her in all these beautiful couture clothes - and, well, let's just say she forgot what time of the month it was," a source tells Page Six.

"It wasn't pretty."

Britney has a habit of soiling expensive designer threads.

During her infamous OK! magazine shoot in 2007, she allegedly wiped her fried chicken-stained fingers on one dress, while her dog pooped on another gown.

Sounds like the mucky pup hasn't quite cleaned up her act.

Britney's Circus