Selena Gomez suffers a rare fashion fail as she steps out in 6 outfits in one day

Selena Gomez made an impressive six outfit changes on Monday as she made her way through London -- but unfortunately, one of them was a flop.

The 24-hour fashion marathon began late Sunday night to early Monday morning, when the star was spotted wearing a mustard-yellow jacket, a white hoodie and white pants. It wasn't our favorite "just got off a plane" ensemble, but hey, nothing wrong with a bit of comfort, right?

As the day wore on, Selena donned a series of long and short dresses, making the most of London's moderate December temperatures. But as she hit up BBC Radio One, she donned one ensemble that made us wonder if she forgot to check the mirror before heading out.

The newly-blonde singer inexplicably paired orange cat-eye sunglasses with a Gothic-inspired studded calf-length dress, which she layered over a white long-sleeve tee. Bright red lips only further complicated the ensemble.

However, she redeemed herself with her other looks of the day, including a lovely floral maxi dress and an off-the-shoulder silk mini.

Our favorite look was a gorgeous black-and-white plaid jacket, which she perfectly combined with red heels, Derek Lam shorts and the same red lip she sported all day.

Earlier this year, Selena did the same rapid-fire wardrobe changes for a day out in New York City. See them all in the gallery below: