Emma Stone is the Spice Girls' self-proclaimed No. 1 fan, so when she stopped by 2DayFM to promote her new film, 'The Amazing Spider-Man 2,' the hosts had a special surprise for the redheaded actress -- a message from Scary Spice herself!

As the British hosts talked Spice Girls with Stone, they told her that Mel B. -- a frequent co-host of the show -- couldn't be there, but she had a special video message for her biggest fan.

"Wait, Mel B. could've been here?!" Stone gasped in amazement. "I'm going to cry!"

The hosts then played Stone the video, and she promptly began fangirling like crazy.

"Oh my God, is Mel B. talking to me? Oh my God, I'm so excited. I'm legitimately crying," she gushed, in fact, legitimately tearing up. "I'm legitimately the biggest Spice Girls fan ever."

But Mel B. didn't let Stone have all the fun -- instead, she turned the tables and called out the actress on choosing Baby Spice as her favorite Spice Girl instead of Scary.

"Why did you like Baby Spice and not me more?" she questioned. "Your punishment for that is I want you to do a rendition of one of the Spice Girls songs."

Stone was slightly horrified, but with a little prompting from the hosts, broke into the rap bridge of 'Wannabe,' adorably freaking out the whole time.

We're calling it right now: Emma Stone was totally the type of fan who would have that Spice Girls pizza that Victoria Beckham hilariously unearthed on Twitter the other day.

Watch Emma Stone fangirl over the Spice Girls above!