Chance: Triangle Session (チャンス〜トライアングルセッション〜, Chansu ~Toraianguru Sesshon~), also known as Chance: Pop Session, is a 2001 anime produced by Madhouse. The series aired from May 21 to August 27, 2001 and ran for 13 episodes.

Three young girls—Akari, Yuki, and Nozomi—meet at a concert and set out to follow in the footsteps of their idol, Reika, and become music stars. They enroll in the prestigious music school that produced Reika and are placed in the "S class" due to their potential.

While Chance Pop Session could be characterized as a romantic comedy in the shōjo category, it does have some elements of tragedy.

This is one of the few anime that for which ADV Films was on the production committee during their time in the anime industry. In the US, they released three volumes of videos on VHS and DVD in 2003. They also released a complete series thinpak on DVD in 2007 and a regular DVD case in 2009. It is currently streaming on Crunchyroll and HIDIVE.