He gained fame as the winner of MuchMusic's 1994 MuchTemp contest, earning the nickname "The Temp" and later "The Franchise," thanks to his long tenure and popularity on MuchMusic. He co-hosted shows like Much on Demand, The MuchMusic Countdown, and The MuchMusic Radio Countdown, with his final appearance on MuchMusic in 2005. He then became a reporter for ET Canada.
Campanelli hosted segments on Deal or No Deal Canada and has been involved with various charitable organizations. In 2016, he joined CFNY-FM as a co-host of the morning show. He made a cameo in a James Barker Band music video in 2016.
He departed ET Canada in 2017, then co-hosted 90's Nostalgia tour in 2021, and joined Z103.5 until December 2022. In 2023, he competed on The Traitors Canada. In 2024, he became an afternoon host at CHFI-FM, and in 2025, he joined Citytv's Breakfast Television as a live eye reporter, while maintaining a Sunday show.