"Stumblin' In" is a song written by Mike Chapman and Nicky Chinn, performed by Chris Norman and Suzi Quatro, taken from the Quatro album If You Knew Suzi.... The single peaked at number four on the Billboard Hot 100 in 1979. The song was Quatro's only U.S. Top 40 hit and Norman's lone U.S. charting effort apart from the band Smokie. In the UK Singles Chart, the disc hit the listing on 11 November 1978, peaked at number 41 and spent eight weeks in the chart. It was a number-one hit in Canada.