Ashlee Simpson says she feels "horrible" after calling fellow pop star Britney Spears 'trashy' during a live radio interview.
During a recent visit to the UK, the Outta My Head singer was quizzed about her knowledge on rhyming slang in London, the World Entertainment News Network reported.
A radio DJ asked Simpson what she thought the phrase, 'You've had one-too-many Britney Spears' meant.
Simpson didn't realise the term referred to drinking too much beer, and immediately regretted her answer, WENN reported.
Recalling the incident on British music show on The Nokia Green Room, Simpson said: "I was like, 'Oh, you've had one too many trashy girls.'
"And I was like, 'Oh my god, I can't believe I just said that!'
"It was really bad, I felt horrible."
Simpson is engaged to Fall Out Boy rocker Pete Wentz, and the pair are rumoured to be marrying in secret this weekend.
She is also rumoured to be pregnant.
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