Ashlee Simpson denied rumors that she was drunk on a radio show.

The singer stumbled over her words and frequently giggled on Washington DC's Hot 99.5 morning show.

When asked about her new single 'Outta My Head (Ay Ya Ya)', Simpson responded: "The best line in the song is uh...You know...The come over line...Uh...Um...It's pretty genius. It's um...I'm not over it so come over...Um...Pretty genius...The girl kind of thing...um...[laughs]."

Ar epresentative for Simpson insists she was just tired.

"Ashlee was absolutely not intoxicated this morning on Hot 99.5.

"She has been working extremely hard traveling across the country to promote her upcoming new album by performing at night and waking up very early the next day to do radio interviews in the morning. Like any of us would be, she was simply just tired."