Pucker up: The singer says she'd happily smooch Scarlett Johansson

By Monique Jessen
September 10, 2008 08:00 AM

Bring on the Cherry ChapStick! Katy Perry is ready to kiss and tell about her current girl crush: Scarlett Johansson.

“I always say that’s the type of gal I would actually kiss,” the singer – still riding high on the success of her megahit “I Kissed a Girl” – told PEOPLE Tuesday at the Serpentine Gallery’s Summer Party in London.

But despite previous press reports, the singer swears her song was not inspired by the Hollywood hottie.

“I remember having a little crush when I was 15 on this girl who was a little bit older than me,” she said at the annual fund-raiser. “She was my best friend at the time [but] I never kissed her or anything. In retrospect, she was my muse for that song.”

The 23-year-old singer-songwriter – who wears a promise ring from her boyfriend, Gym Class Heroes’ Travis McCoy – was fresh from her performance at the MTV Video Music Awards. (She was nominated in the Best New Artist category.)

“I met Leona Lewis who I love,” gushed the L.A.- based singer, wearing a t-shirt dress by Sretsis. “She can sing her backside off! That was the highlight.”

Perry left the party being carried piggyback by her pal Mika. She is due to perform in London on Wednesday night as part of her European tour.