The 32-year-old rocker was held by cops in the early hours of Saturday after lashing out when she was denied drink service at Portland's Bungalo Bar over concerns she was too intoxicated, reported Contactmusic.
A source was quoted as telling local newspaper the Willamette Week that Ditto left the venue and began causing a disturbance on the street by kicking off her shoes and screaming "Obama, Obama!"
Ditto was taken into custody and later released on her own recognisance.
Her mugshot and booking information have been published on the Multnomah County Sheriff's Office website.