The 3rd Masterpiece is the third Korean studio album by South Korean male vocal group SG Wannabe. The record was a commercial success in South Korea, peaking at number one on the monthly MIAK album chart for two consecutive months[1][2] and sold over 311,000 copies by the end of the year.[3] It was the second best-selling album of 2006 according to MIAK, only behind TVXQ's "O"-Jung.Ban.Hap which sold 349,317 copies.
Similar to what they did in their second album (the music video had two parts; the first part was with the song "Crime and Punishment" ("죄와벌"), while the second part was with the song "As We Live" ("살다가")), their third album also contained two-part music videos. The first part was with their new title song, "Partner for Life" (내 사람) starring Shinhwa's Kim Dong Wan and also featuring Jeong So-Young, and the second part was released with "Slowpoke" ("느림보").