Although "Pretty Girls" came out in May, Britney Spears is finally adding it to the setlist for her Piece Of Me show in Las Vegas. Fans captured the Iggy Azalea-less performance at her residency at Planet Hollywood on Wednesday night.

This solo performance comes months after Iggy blamed the song's poor performance on lack of promotion.

"its difficult to send a song up the charts without additional promo and tv performances etc. unfortunately im just featured..." Azalea had tweeted back in June. The song peaked at #29 on Billboard's Hot 100, a flop, according to Azalea, who has held multiple #1 spots.

Although Spears and Azalea shared the song, they only performed the song once together -- at the Billboard Music Awards in May. They both appear in the music video, which now has more than 100 million views. Brit's performance in Vegas takes on the brightly colored, cool-kid vibe of the music video and, of course, includes a killer dance routine.