5566 was a Taiwanese boy band, formed under Taiwanese music company, J-Star. The name is derived from their original five members (Zax Wang, Jason Hsu, Sam Wang, Rio Peng and band leader Tony Sun), working in six entertainment fields (singing, movies and dramas, hosting, modelling, commercials, and dancing). Over the course of their career, they have starred in three idol dramas: My MVP Valentine, Westside Story, and Mr. Fighting. They have also released four albums: 1st Album, Boyfriend, Long Time No See, and Bravo; two compilation albums: C'est Si Bon Greatest Hits, I Love 56 - Re-emerging Legends: 5 Years Greatest Hits; and taken part in four OSTs: My MVP Valentine OST, Westside Story soundtrack, Mr. Fighting OST, and Ying Ye 3 Jia 1.
5566 disbanded in 2008, but occasionally reunited in 2014, 2016 and 2019.