Lighthouse was "Canada's Chicago." Big horns, tight production, expert musicianship, clean vocal. As noted earlier in this thread, Lighthouse received considerable airplay in Buffalo. "Sunny Days" was another Lighthouse song that received Buffalo airplay. Fact is, countless Canadian groups got an early "lift" in the states by virtue of airplay on Buffalo AOR and Top 40 radio stations. The Guess Who, years later, Rush and there are others, such as Trooper, Honeymoon Suite, Joni Mitchell* and Alanis Morissett. Toronto had a thriving music scene. Most US residents have no clue as to the size and energy of that international city. I can't help side-banding into the political realm by stating how absurd is the thought of Canada becoming a 51st state. Truly ludicrous.
But, back to center channel: In the 60s and 70s, both 1050 CHUM and the Big 8 CKLW were prime Top 40 signals in the Buffalo market. CHUM-FM at the time was a premier AOR. The 716 were influenced by a lot of CanCon.
As to this thread, "Raised On Robbery*" cool song by Joni Mitchell qualifies, peaking on the Billboard Chart at #65 in 1973.