Niall Horan turned Prince Charming at a Disney-themed bash to celebrate British pop star Rochelle Humes' 25th birthday on Saturday night (29Mar14). The One Direction singer was among the star-studded crowd to don fancy dress in honour of Humes' recent birthday (21Mar14) at the Steam and Rye nightspot in London. Horan showed up in full regalia, including cream coat and knickerbockers, while the birthday girl channelled Aladdin character Princess Jasmine. Her husband, former JLS star Marvin Humes, arrived dressed as Aladdin, while their fellow pop star Tulisa Contostavlos also put in the effort and donned a fairy godmother outfit. Rochelle's bandmates from The Saturdays ensured they weren't outshone - Frankie Sandford arrived as a pirate, while Una Healy made a splash in a Little Mermaid costume. Humes took to Twitter.com after the bash to thank her pals for putting in the effort, writing, "Thanks to all of my friends for doing me proud with the dressing up EVERYONE went in!"