The Plain White T's are an American pop rock band from Lombard, Illinois, formed in 1997 by high school friends Tom Higgenson, Dave Tirio, and Ken Fletcher, and joined a short time later by Steve Mast.

[1][2] The band is best known for their number-one hit song "Hey There Delilah", which achieved platinum status in 2007 and earned two Grammy nominations.

The group began as a trio, with Higgenson as singer and guitarist, Fletcher on bass guitar and Tirio on drums.

As the band began to establish itself in the local scene, a fourth member, Steve Mast, was recruited.

Higgenson changed his songwriting process, choosing songs that were more meaningful to him, and the band began taking its music career more seriously.

While the band toured in support for the album, both Fletcher and Mast left in 2003; they were replaced by Tim Lopez and Mike Retondo.

Shortly after, Tirio decided to switch from drumming to rhythm guitar and new drummer De'Mar Hamilton was added to the line-up.

The band left Hollywood Records after creative conflicts with the label during the production of the American Nights album.

On November 22, 2015, the band released a music video for "American Nights" featuring Higgenson's son, Lennon.

[23] In July 2017, the band closed the 2017 National Scout Jamboree, exactly 10 years after "Hey There Delilah" was number-one[24] on the charts.