Robert Kelly Thomas (born February 14, 1972, in Landstuhl, West Germany on a US military base) is an American rock recording artist and songwriter. He is the primary songwriter and lead singer of the band Matchbox Twenty and formerly of the band Tabitha's Secret. Thomas also records and performs as a solo artist. Thomas earned three Grammy awards for co-writing and singing on the Carlos Santana triple-platinum hit "Smooth" on the album Supernatural in 1999. He has also lent his songwriting talents to such artists as Willie Nelson, Mick Jagger, Marc Anthony, Pat Green, Taylor Hicks, Travis Tritt and Daughtry. "Her Diamonds" is the lead single from Rob Thomas's second studio album Cradlesong. Thomas confirmed the single's release via a Twitter account he had created on March 11th, 2009. The single premiered on April 22, preceding the release of Cradlesong on June 30th. On July 3rd, 2009, Thomas confirmed in an interview with Natalie Morales and Lester Holt on NBC's Today show that the song references his wife Marisol's auto-immune disease. Thomas announced his wife sang backup on the track and also helped produce its arrangement.Robert Kelly Thomas (born.