Blake Lively & Baby Spice Joke Over Old Throwback Spice Girls Concert Pic

Blake Lively and Emma Bunton (a.k.a "Baby Spice") had an adorable moment of nostalgia on Instagram after a photo of the actress dressed as the Spice Girls member unearthed on social media.

It all happened Saturday (August 4) when an unsuspecting fan of the iconic girl group made an incredible discovery after flipping through old concert memories over the weekend. "Found a picture when I was 5 at my first concert. #SpiceGirls and took a picture with a girl dressed up as Baby Spice who I just realized now was @blakelively," a woman named Bria Madrid inscribed a pic of her and the 30-year-old actress sporting pigtails and disco boots a la a certain Spice Girl.

It didn't take long for the Gossip Girl performer to realize the girl rocking those rad pigtails was, in fact, her. The star retweeted Madrid's post, writing, "My secret is out…"

After thanking the follower for sharing the Kodak moment, Lively posted the pic to Instagram with this hilarious caption: "Pretending to be someone else… since 1997 (Thanks @briaaamadrid for the photo of us at the Spice Girls concert. Sorry -not sorry- I tricked you into thinking I was @emmaleebunton)."

The snap produced more than 1 million likes and a flurry of comments praising Lively's stylish tribute. Among those to leave a comment was the 42-year-old British pop star herself, who gushed over the throwback photograph. "So cute, you’re rocking those pigtails @blakelively 👧👧,” Bunton remarked, to which an anxious Lively replied back: "@emmaleebunton I’m officially ☠️☠️☠️☠️. Forever bowing down to you. 💕💕💕 I cannot believe you know who I am. This will never be normal. ☠️😍.”

Photo: Getty Images