Mel B stunned fans as she hopped onto the Tube to Friday's Spice Girls concert at Wembley Stadium.
Scary Spice documented her London Underground journey to the sell-out gig on her Instagram page.
Holding up her Oyster card, she told her followers: “We are on the Tube on the way to Wembley, so we are not late."
In photos, she is seen sitting on the busy train in casual clothes surrounded by commuters.
The Spice Girls play three gigs at London's Wembley Stadium, the first last night and the last on Saturday, rounding off the girl group's reunion tour.
On Thursday, Mel B described the Spice Girls' concert in London as one of the most important moments of her life.
She has been joined on the tour by Emma Bunton, Geri Horner and Melanie Chisholm since late May.
The group have played in Dublin, Cardiff, Manchester, Coventry, Sunderland, Edinburgh and Bristol.
Hollywood star Emma Stone was among the fans at the first of the Wembley gigs.
Bunton told the Heart Breakfast radio show earlier on Thursday: "Do you know who we've got coming? Oh, I hope I'm allowed to say this but Emma Stone is coming tonight, and I've never met Emma Stone and we're going to be meeting her, so I'm really excited."
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