Katy Perry Crashes Wedding During 'Witness Tour' Stop, Dances With the Newlyweds

The 'Chained to the Rhythm' hitmaker seems excited as she dances to Justin Timerlake's 'Sexy Back' at a wedding in St. Louis.

Katy Perry made another headline during her "Witness Tour". After helping a couple get engaged onstage and being stuck mid-air during concert, the "Swish Swish" songstress decided to crash a wedding reception at Four Season Hotel in St. Louis on October 21. She had a show at the Scottrade Center the following day.

An eyewitness told TMZ that Katy joined the reception for 15 minutes with about 30 to 40 of her crew members. She was mostly seen hanging out with the newlyweds, taking over the dance floor and even performing for the guests. She decided to leave after things got rowdy, though. Some of her crew members were still hanging out at the party after the singer left.

Photographer Ray Prop managed to capture her 15-minute appearance at the wedding. He posted several pictures of the moment, including a picture of the newlyweds, Hayley and Blonie, and Katy together. Sporting a navy blue jumpsuit and a pink cap, the "American Idol" judge leaned on the bride as she flashed a huge smile and made a peace sign. Ray captioned it, " 'Do you mind if we crash your wedding' Katy Perry."

A guest also posted a video of Katy dancing. With Justin Timberlake's "Sexy Back" playing in the background, Katy looked like she was enjoying herself as she twerked with the bride.

Some guests also shared the epic moment by posting a selfie together with the "Last Friday Night" singer. A guest named Justine revealed that she was really happy to be able to meet Katy. She wrote, "I can't even begin to express the emotions running through me right now. I've met the one person who's music has always hit the heart. KP fa life."

A concertgoer reported that Katy couldn't stop talking about "crashing a wedding" at the concert. "She talked about 'crashing a wedding' the entire concert! So fun you were there!" the concertgoer said.