Inspired by the Hall & Oates post I pulled up a lot of Hall & Oates yesterday, including some live stuff where they fucking shred, like this version of "Lady Rain" off their excellent LP Abandoned Luncheonette (their best for me), where Hall is strumming some mandolin. Anyway, it made me think of a couple of other pop songs that use unexpected (as opposed to, like, John Paul Jones playing on the Zep acoustic tunes) plucked string instruments heavily, so here you go. Anyway, Daryl Hall fucking rules.
Lady Rain (live - Musikladen; there is also an excellent Old Grey Whistle Test one from the same era):
Kenny Loggins - Lady Luck (huh, both have "Lady," that's a coincidence. Maybe not, though, feel like Loggins def might have gotten this from Hall, much like MJ/Quincy got a similar vibe for Billie Jean from "I Can't Go For That"...maybe.) Bouzouki, mandolin, and mandola by Wrecking Crew legend Tommy Tedesco.
Cheap Trick - Mandocello. It's all there in the title, really.
Anyway, I'm sure there are a ton more, but those immediately came to mind, and the Loggins and Cheap Trick appeared on some Spotify Weekly thing for me a couple years ago, so that's a win for the algorithm, our new God.