"Believe What You Say" is a song written by Dorsey Burnette and Johnny Burnette and performed by Ricky Nelson. The song reached No. 4 on the Billboard Hot 100, No. 6 on the R&B chart, and No. 10 on the country chart in 1958. The song appeared on his 1959 album, Ricky Sings Again, with additional backing vocals. The song also appeared on his 1970 album, In Concert at the Troubadour, 1969.