Stephen Bishop "Walking on Air"

Dentist offices all across America played Stephen Bishop's "Walking on Air" back in 1989. The cheesy soft rock tune somehow went all the way to #13 on the Adult Contemporary Chart.

Nicolette Larson - "Let Me Go, Love"

The buttery smooth voice of Michael McDonald supports Nicolette Larson in the 1979 dentist office favorite, "Let Me Go, Love".  While the song isn't considered a duet, one listen to the tune and you'll agree McDonald does more than just provide backing vocals -- in fact, some have argued that his voice overshadowed hers.