The Spice Girls have reportedly been offered more than $1 million each to reunite for a Christmas concert.
Mel B joined Victoria Beckham, Geri Halliwell and pregnant Emma Bunton in London for Victoria's husband David's 32nd birthday bash on Wednesday night.
Celebrations at exclusive Italian restaurant Cipriani soon turned into reunion talks after the girls were asked to consider staging a comeback show.
A source told Britain's The Sun newspaper: "Mel B had been telling everyone she was going to London to say happy birthday to David. She went to the party because she wanted to hang out with the girls and because they had business to discuss. They have been offered a fortune to do the show and they want to do it."
Mel C, who did not attend the party, is said to now be open to the offer after meeting her former bandmates at the christening of Geri's daughter Bluebell Madonna last month.
Despite being in good spirits at the beginning of the night, Mel B reportedly burst into tears when the celebrations moved to China white nightclub.
The emotional star opened her heart about her paternity battle with former lover Eddie Murphy, who denies he is the father of her new baby Angel Iris, to David's sister Joanne.
A source said: "It was her first night out clubbing since the baby was born and she became incredibly emotional."
Just days ago Mel B told TV show "Extra" Eddie knows he is the father because they had planned to have a baby.
She said: "This baby was planned and he knows it's his, this is what's mind-boggling."
Mel has put Eddie's name on her daughter's birth certificate and is seeking a court ruling to force him to take a DNA test.