Adam Lambert has spoken out in praise of British star Jessie J.

The vocal powerhouse is currently over in Jessie J's homeland as he prepares to perform with Queen this summer, and it seems like he's been getting in the party spirit.

Speaking to Yahoo's OMG!, Lambert said that he went out after a recent performance at London's G-A-Y club and bumped into a number of stars - including Katy Perry.

However, he took time to praise Jessie J, saying that she can "sing circles around so many people". He said:

"After the G-A-Y performance we decided that we needed to keep partying. We met up with Katy Perry and her dancers and saw Jessie J there. She's lovely, I'm a big fan. I love her. I think she's fabulous. She can sing circles around so many people. Carly Rae Jepsen was there too, who's a sweetheart, adorable and very cool. I think I saw The Wanted boys too."