In addition to acting, singing, and dancing, all three sisters can play the guitar, bass, and piano.

The music executive heard the sisters sing and encouraged director Rob Hardy to audition China for his 2005 feature film The Gospel.

[9] In 2008 the group recorded the song "Daddy's Girl",[12] inspired by the movie, and released it exclusively on MySpace.

[13] In 2008 the group began posting videos on their YouTube channel of themselves singing covers of songs.

[14] They also continued pursuing their acting careers separately, making various appearances in films and on television.

[15] In December the group performed their version of the song "Jingle Bell Rock" at the 2011 Disney Parks Christmas Day Parade.

[23] The song was written by the sisters and produced by their father, Michael McClain, and was the lead promotional single for the Disneynature film Chimpanzee.

[31] On October 2, 2012, their version of "Jingle Bell Rock" was featured on the album Disney Channel Holiday Playlist.

"[33] Lauryn and Sierra guest starred and performed the song, alongside China, on November 23, 2012, during the episode "chANTs of a Lifetime" for A.N.T.

[35][36] On March 5, 2013, the soundtrack album Shake It Up: I Love Dance was released for which the group performed their single "Sharp as a Razor.

[38] Shortly after this announcement, the McClain Sisters parted ways with Hollywood Records.

[42][43] The group released an official lyric video for their single "He Loves Me" on YouTube on December 14, 2013.

[50] On June 29, McClain had their first headlining concert at the House of Blues in Anaheim, California.

[59] In August 2014, McClain also performed at Six Flags Over Texas,[60] and the 19th Arthur Ashe Kids' Day.

[68] In June 2020 the group returned from their hiatus, changed their name to Thriii, and released their single "My Sanity".

[75][76] In 2014, Lauryn and China created a YouTube channel where they posted singing videos, challenges, tags, and Q&As.