Alex Trebek: At their peak in 1967, this band outsold both the Beatles and the Rolling Stones.
Sean Connery: Your mother.
Oh Sean Connery, you dog. This answer is, of course, The Monkees, the original made-for-TV band that unexpectedly became a legitimate musical group during filming and after their sitcom ended.
Their breakout hit, “I’m a Believer” (now aka “that song from Shrek”) went gold in two days, and is one of the few singles ever to sell ten million or more physical copies worldwide (per Wiki).
Truly one of the oddities of the past half-century in music, a collection of bit actors who had basic musical training joined together for a sitcom about a band that “wanted to be the Beatles, but was never successful.” While you could argue that the band really did want to be the Beatles, you can’t argue against two number one singles in the span of two years. The charts were a much better indicator of success in the pre-internet era, and the Monkees sold out shows all over the world.
That other single? “Daydream Believer,” a hopeful ditty that gave some respite to wartime America and the young men serving and dying in Vietnam. Singer Davy Jones has one of the weirdest pop voices of all time, and I can’t tell whether I like it or not. The song, however, is beyond reproach. It’s corny, jubilant and surprisingly heartfelt. Hope it boosts your spirits.