Splish Splash" a 1958 song performed and co-written by Bobby Darin. It was written with DJ Murray the K (Murray Kaufman), who bet that Darin couldn't write a song that started out with the words, "Splish Splash, I was takin' a bath", as suggested by Murray's mother, Jean Kaufman. The song was credited to Bobby Darin and "Jean Murray" (a compilation of their names) to avoid any hint of payola. The song helped to give Darin a major boost in his career, reaching number 3 in the U.S. pop singles charts. It was recorded in a session at New York's Atlantic Studios on the evening of April 10, 1958.

The lyrics mention several characters from other songs of the period, including "Lollipop", "Peggy Sue", and "Good Golly Miss Molly". The song was featured in the trailer for the Patrick Dempsey film Loverboy. The song appears in the soundtrack for the 1998 movie, You've Got Mail, and also in an episode of Happy Days where Richie Cunningham becomes a DJ, 'Richie The C' (possibly a play on Murray the K). It was also featured as a DTV music video on The Disney Channel, set mostly to clips of Disney characters bathing, particularly from the 1948 cartoon Mickey and the Seal (illustrating the singer's bath in the first verse), but also Mickey's Birthday Party (to illustrate the party he walks in on). Kevin Spacey performs the song in the Bobby Darin biopic Beyond the Sea.
~Source wikipedia