Heavy rock or euro pop? It's the choice on Saturday night as two big musical dates clash head on.
In the black corner, there's Ozzy Osbourne's modestly named Ozzfest and in the pink corner is the Eurovision Song Contest.
Morwenna Gordon helps you make up your mind:
Eurovision song contest
Started: 1956 (in Switzerland) Venue 2002: Tallinn, Estonia Best known for: introducing Abba to the world
Line-up: includes our very own Jessica Garlick and the Russian boy (ish) band, Prime Minister. Sample lyrics: You make me sweat in my emotions, under your flyaway, flyaway wing (from Latvia's entry, I Wanna by Marija N) What the experts say: "People say it's rubbish and they're right," says presenter Terry Wogan. Side orders: viewers get a virtual tour of each competing country. Can't be there? Check out the coverage on BBC One, Radio 2 and BBC Choice.
Started: 1996 (by Ozzy and wife/manager Sharon) Venue: "the home of rock", Donnington Park Best known for: hard rock and bat-munching antics. Line-up: It's Ozzy's party really, but other acts include Tool, System of a Down and Slayer. What the experts say: "You're running around being the man from Satan's village, going "arghh'' - Ozzy on Ozzfest Side orders: in those quieter moments Ozzfesters can visit the sideshows at the Village of the Damned Can't be there? Check out live broadcast on Radio 1