"What Makes You Beautiful" is the debut single by British-Irish boy band One Direction. It was released in 2011 as the lead single from their debut studio album, "Up All Night."

"What Makes You Beautiful" is an infectious and upbeat pop song with elements of teen pop and dance-pop. The song's lyrics convey a message of admiration and appreciation for a girl's natural beauty, encouraging her to recognize her uniqueness and self-worth.

The song was written by Savan Kotecha, Carl Falk, and Rami Yacoub, who also produced it. It features the signature harmonies and youthful vocals of the members of One Direction: Niall Horan, Liam Payne, Harry Styles, Louis Tomlinson, and Zayn Malik.

Upon its release, "What Makes You Beautiful" received widespread commercial success and critical acclaim. It topped the charts in several countries, including the UK Singles Chart, making One Direction the first British band to debut at number one with their first single.

The song's music video was shot on a beach in Malibu, California, and features One Direction enjoying their time on the beach and singing to a group of girls. The video captures the carefree and fun-loving spirit of the band.

"What Makes You Beautiful" became an anthem for One Direction fans, known as "Directioners," and played a pivotal role in propelling the band to international fame. The song's catchy melody, positive message, and the boys' charming personalities resonated with audiences, especially teenage girls, making it a massive hit in the pop music scene.

Over the years, "What Makes You Beautiful" has remained one of One Direction's most iconic and beloved songs. It represents the beginning of the band's successful career and their influence on the pop music industry. The song's impact on the music landscape, along with the group's massive fanbase, helped solidify One Direction as one of the biggest boy bands of their generation.