Leonard Raymond Sipes (September 28, 1930 – March 14, 2000), better known as Tommy Collins, was an American country music singer and songwriter.

Active primarily during the 1950s through 1970s, Collins was instrumental in helping create the Bakersfield sound of the country music genre. He enjoyed a string of hits during the mid-1950s including "It Tickles" and "Watcha Gonna Do Now." He also wrote several songs for other artists, including "If You Ain't Lovin' (You Ain't Livin')," which originally became a top 10 hit for Faron Young in 1954 and became a No. 1 hit by George Strait in 1988.

After several years in the ministry, Collins returned to recording. In 1965, he had a comeback hit with "If You Can't Bite, Don't Growl." In the 1970s, he wrote several hits for Merle Haggard, including the No. 1 hits "Carolyn" and "The Roots of My Raising." In 1981, Haggard recorded a biographical tribute to Collins called "Leonard," the title referring to Collins' real name.

Collins remained active in the songwriting business. He died March 14, 2000, in Ashland City, Tennessee.