Sir Elton John is working with Lady Gaga on her new album, which she said will be released this year.
The friends will join each other in the studio this week to work on Gaga's fifth studio album.
Elton's heard two of the songs so far and has already said they sound "killer".
He added that he won't be afraid to say what he really thinks about her other new tracks too.
The Oscar nominee's last full pop album, Artpop, was released in 2013.
Tracks included Applause and Do What U Want, featuring R. Kelly.
Since then she's done a collaborative album with Tony Bennett, 2014's Cheek to Cheek.
But these are the brand new tracks fans have been eagerly awaiting.
"I'm writing with Gaga," Sir Elton confirmed to Beats 1 Radio.
"I've heard two songs, which are killer. They're just great songs. It's like back to the early stuff of hers, like You and I and Bad Romance," he said.
t seems he won't be afraid to hold back either.
"Artpop was not a great idea. It was not a good album and I think she would admit that," Elton said.
"Then in the midst of that, she did three things which were kind of amazing.
"She did the whole tour and album with Tony Bennett, which did amazingly well. She sang the Julie Andrews tribute at the Oscars, which everybody loved. And she was on American Horror Story."
He said: "I think she's a great writer. To me, she is Stefani Germanotta and I love her and I care about her - she's godmother to my two children.
"I want her to go and make a kind of simple, fabulous, great song record."
By BBC Newsbeat
