Artists and debut singles with more than 7 weeks logged at #1 this decade:
Mark Ronson (Uptown Funk! - 14)
Charlie Puth (See You Again - 12)
Calvin Harris (We Found Love - 10)
Carly Rae Jepsen (Call Me Maybe - 9)
Lorde (Royals - 9)
Ke$ha (TiK ToK - 9)
Meghan Trainor (All About That Bass - 8)
It's likely Meghan, otherwise they wouldn't be so specific with more than 7 weeks.
