In The Dark

The Spice Girls and the Backstreet Boys set off on a joint American tour, which comes crashing to a halt when their tour bus is involved in a collision and three band members disappear.

Set in 1997, but with today's technology (for no other reason than I wanted it to be that way)

Thank you to whoever created the Wiki for this story on All The Tropes! https://allthetropes.org/wiki/In_The_Dark (contains spoilers)