Lanni also played the song to his bandmembers in Sheriff. "The band really liked it, so we started playing it live. That was one of the last songs we recorded when we did the record. The producer said, 'Is there anything else?' I said, 'There's this song we play, it's kind of a wimpy song.' So we played it for him and he said 'Yeah, that's kind of nice.'"
"When I’m With You" was also a song from the 30’s and 40's sung by Shirley Temple and Alice Faye; however, they are two different songs.
In 1988, a disc jockey in Las Vegas began playing the song, and other stations followed. This encouraged Capitol Records to re-release the song as a single. On February 4, 1989, "When I'm with You" hit number one in the United States.
By that time Lanni and bassist Wolf Hassell had formed a duo dubbed "Frozen Ghost", and declined to re-form the group. Sheriff's lead vocalist Freddy Curci and guitarist Steve DeMarchi subsequently formed the band Alias and reached the top of the charts again the following year with the similar number-two hit "More Than Words Can Say".
| Chart (1983) | Peak position |
|---|---|
| Canadian Singles Chart | 8 |
| U.S. Billboard Hot 100 | 61 |
| Chart (1989) | Peak position |
| U.S. Billboard Hot 100 | 1 |
| U.S. Billboard Adult Contemporary | 1 |