Three months after he allegedly displayed his genitals onstage in Los Angeles, Cedric "K-Ci" Hailey was charged Tuesday with 23 counts of indecent exposure and one count of lewd conduct, law-enforcement officials said.

The K-Ci & JoJo singer will be arraigned in a Los Angeles courtroom April 11. He faces a maximum penalty of one year in prison for the indecent exposure counts and six months behind bars and a $1,000 fine for the lewd conduct count, according to Deputy City Attorney Phyllis F. Henderson.

MCA Records, K-Ci & JoJo's label, would not comment, because the case is pending litigation. Henderson could not release the name of Hailey's lawyer, because the singer has not appeared in court. Representatives for Hailey were unavailable for comment.

Hailey recently declared his innocence, noting, "If y'all know K-Ci, y'all know K-Ci didn't do it. I wouldn't do nothing vulgar like that in front of kids, because I have children myself — an 8-year-old and a 2-year-old. I would not allow my child to see anything like that."

Police have been investigating the incident since the evening of December 16, when about 150 people stormed out of KIIS-FM's annual Jingle Ball at the Shrine Auditorium and told officers on patrol that Hailey "grabbed himself at different stages of erection," according to records.

About 4,000 people, including hundreds of children, were at the concert, which also featured Christina Aguilera, 98 Degrees and Third Eye Blind.

One of the families that issued a complaint, Robert and Robin Garcia and their teenage daughter, Rachel, is suing Hailey for nuisance, infliction of emotional distress and negligence. A date has not been set for the case.

Several popular musicians have faced indecent exposure charges in the past, but none has actually served significant jail time for the offense.

The most famous case was Doors singer Jim Morrison's arrest for allegedly simulating masturbation and oral sex during a Miami concert in 1969. The case dragged on for nearly a year before the charges were dropped.

The late Lynn Strait of the hard-rock band Snot was arrested at an Ozzfest stop in Massachusetts in 1998 after emerging naked from a prop toilet — part of fellow Ozzfest performers Limp Bizkit's stage set. Strait was killed in a car accident before the case got to court.

And Green Day's Billie Joe Armstrong paid $141.85 bail after he was arrested in Milwaukee in 1995 for exposing his buttocks.