Adam Lambert to Katy Perry: I'm Blue with Envy!

Adam Lambert smiles for photographers as he heads out to lunch on Tuesday (February 28) in Los Angeles.

The 30-year-old singer suited up over the weekend for the Elton John AIDS Foundation Academy Awards Viewing Party.

PHOTOS: Check out the latest pics of Adam Lambert

At the party, Adam and his boyfriend, Sauli Koskinen, hung out with Katy Perry.

“[S]oooo lovely catching up last night!!! U looked drop dead gorgeous. Blue w Envy!! ;),” Adam tweeted to Katy after the party.

Earlier this month, Adam confirmed that he’ll perform with Queen at a show in July.