Irreplaceable () is the first extended play by the Taiwanese girl group S.H.E. It was released on August 26, 2016, by HIM International Music. The EP was commemorating for 15th anniversary of S.H.E's debut.
The track "Irreplaceable" is listed at number 44 on the Hit FM Top 100 Singles of the Year chart for 2016. The album is the 4th best selling album in Taiwan in 2016, with 45,000 copies sold. The album also received the Top 10 Selling Mandarin Albums of the Year in the IFPI Hong Kong Album Sales Awards 2016.
The music video for "Different Ways" was uploaded on May 24, 2016. The video for "Irreplaceable" was released on August 11, which was directed by Bill Chia and Bounce.
S.H.E held a Reunion One in One 15th Anniversary Special Exhibition in Songshan Cultural and Creative Park, Taipei, from August 26, 2016, to September 19, 2016.