Robert Kelly Thomas is an American musician. He is the lead vocalist for the Florida-based rock band Matchbox Twenty, which he formed in 1995 and with whom he has released five studio albums. As a solo act, he is best known for his guest performance on Santana's 1999 single "Smooth", which won three Grammy Awards, reached number one on the Billboard Hot 100, and in 2018 was named the second-most successful song in the chart's history. His 2005 single, "Lonely No More" was his first to be released as a lead solo artist. It peaked at number six on the chart and led his debut solo album, ...Something to Be (2005), which peaked atop the Billboard 200.
As part of Matchbox Twenty, Thomas has written and performed their string of commercially successful singles, including "Push", "3AM", "Real World", "Back 2 Good", "Bent", "If You're Gone", "Mad Season", "Disease", "Unwell", "Bright Lights", "How Far We've Come", and "She's So Mean". Thomas has also been a credited songwriter for other artists including Willie Nelson, Mick Jagger, Marc Anthony, Pat Green, Taylor Hicks, Travis Tritt, and Daughtry.