AV it; Avril has Sum fun.
POP princess Avril Lavigne gets warmed up for today's Party in the Park show in London - by grabbing hold of boyfriend Deryck Whibley in the LA heat.
The Canadian singer - who has accused Britney Spears and Christina Aguilera of being too sleazy - and Sum 41 star Deryck groped, kissed and fondled each other in front of startled guests at their hotel. One onlooker said: "They were all over each other. They didn't care who saw them."
Avril, 19, recently said of Britney and Christina: "I look at their stuff and I think it's kind of nasty. Britney bugs me more than Christina does.
"I have a little more respect for Christina because she sings for real and has a great voice. But you won't see me on stage in a sexy outfit."
EAR WE GO: Rock star Deryck gets mobile; SUM LIKE IT HOT: Kisses for Avril and Deryck