Niall Horan celebrates birthday in Las Vegas with bikini-clad dancers

Having a fractured foot sure didn't stop Niall Horan from partying it up in Las Vegas over the weekend!

The 22-year-old celebrated his birthday with BFF Louis Tomlinson at XS nightclub in Sin City, where they were joined by bikini-wearing dancers and a handful of famous faces. 

The bandmates, now named Nouis by fans, were pictured enjoying vodka and sipping on champagne throughout the night as they watched Diplo's performance. 

One Direction fans nabbed videos and photos of Nouis during the night, with Niall often waving to fans as he passed by. 

They even shared a photo with Enrique Igesias and Lil Jon. 

The pair called it a night at around 5am, heading back to the Wynn Hotel in tinted-window cars. 

On Saturday night, Niall began to sing Taylor Swift's 22 to a crowd in Boston, before admitted "I don't know the words."