It Should've Been You is the title of a number-one R&B single by Teddy Pendergrass. The hit song spent one week at number-one on the US R&B chart and would be the last of three singles to reach the top spot on the chart.[1]
References
^Whitburn, Joel (2004). Top R&B/Hip-Hop Singles: 1942-2004. Record Research. p. 455.