Kelly Osbourne found going to a festival sober "weird".
The presenter – who has been in rehab three times to be treated for an addiction to prescription drugs – insists she found California's Coachella festival much more enjoyable without consuming alcohol and narcotics, but admits it took some getting used to.
She said: "It was a bit weird being totally sober at a festival, and the first day it took a bit of getting used to.
"In the end, it was way better because I saw so many more bands and explored the festival more than I would have before. The standout acts for me were Gossip, Gorillaz and Jay-Z."
Kelly had a particularly "brilliant" time at the music event because so many of her British friends had an unexpected lengthy stay in California because of the disruption to air travel caused by the Icelandic volcano.
She added in her column for Closer magazine: "It meant that all my London friends who came over to Los Angeles for Coachella were trapped here!"