Kelly Osbourne is the daughter of rock legend Ozzy Osbourne and his wife Sharon Osbourne. She has two siblings: Aimee Osbourne and Jack Osbourne, and two half-siblings: Jessica Hobbs and Louis Osbourne, Ozzy's children from his first marriage.

Kelly has nicknames including "Kelly O" and "Kel". She is on record as 1.60 m (5 ft 3 in) in height. [1] Note that she has described herself as "5 foot 2 inches" (1.57 m) in height.

Her debut album Shut Up! was released in 2002 to moderate sales, fueled mostly by a cover version of the hit Madonna song Papa Don't Preach. Kelly's 2002 Epic debut, "Shut Up," debuted at No. 1 on Billboard's Heatseekers chart. The album was met with fairly good critical reviews. However, Shut Up! failed to spark much interest, and by May 2003, Kelly had been dropped from Epic. The setback neither slowed her down nor shut her up, and by autumn Kelly had resurfaced on the Sanctuary label. She later recorded a duet with her father of "Changes," a Black Sabbath song. The duet hit #1 on the UK charts, a first for Ozzy and Kelly. Shut Up! was repackaged with this duet and a few live cuts and rereleased as Changes. Sales did not improve.

Kelly Osbourne's Sleeping in the Nothing debuted at #117 on the Billboard Top 200 selling just under 9,000 copies.

Sleeping in the Nothing sees Osbourne make a rather smooth transition from rock to 80s dance-pop. Sleeping in the Nothing was co-written and produced by legendary songwriter/former popstar, Linda Perry.

The first single from the album, "One Word" peaked at #1 on three Billboard dance charts. Kelly Osbourne became the first artist in the history of the Billboard charts to top all three dance surveys in the same week.

The album was not without controversy, due to its heavily altered album cover, in which Osbourne appeared markedly slimmer. The image, which graced the album cover and most of its promotional material, angered many fans due to her previous reiterations of being happy with her size, and not wanting to change for anyone.

Additional controversy surrounded "One Word", which borrowed heavily from the Visage hit "Fade To Grey." Billy Currie, co-writer of "Fade To Grey", accused "One Word" writer Linda Perry of copyright abuse. However, the issue was apparently resolved as Visage have since remixed "One Word."

During an interview in late 2005, Osbourne denied reports she is ending her music career, and is said to be working on a new album.

Osbourne was quoted as saying: "I don't know where the quit rumours came from - I've just recorded a version of Girls Just Wanna Have Fun with Cyndi Lauper."