Britney Spears' collab with Elton John 'Hold Me Closer' is popping off! 

Fans are so happy to have Britney back that now other artists are lining up to work with her.

Madonna revealed on her Instagram account she wants to collaborate with Britney Spears again:

“I’m gagging to work with Britney again.”

The pair previously worked together on 'Me Against The Music' in 2003.