(BTS' Facebook page)

BTS shared more group photos for its fourth-anniversary event “2017 BTS Festa” via social media, Saturday.

(BTS' Facebook page)

(BTS' Facebook page)

Each member of the band wore different stage outfits to perform the group’s hit songs, including “Dope,” “Not Today,” “Spring Day,” “Run,” “Fire,” “Save Me” and “Blood, Sweat & Tears.”

(BTS' Facebook page)

(BTS' Facebook page)

Tuesday will mark the group’s fourth anniversary since its debut. Ahead of the annual celebration, the K-pop act is set to offer new photos, video clips, special songs, funny profiles and a radio show to fans to express their gratitude.

(BTS' Facebook page)

Since its debut in 2013, BTS has enjoyed international fame and popularity both in Korea and abroad.

By Jie Ye-eun (yeeunjie@heraldcorp.com)