In past decades, pop music seemed like there was a much greater separation between rock, dance, and hip hop music. And of course you had specific subgenres within each (alternative, trance, house, etc)
These days, they all seem to overlap in a sort of crossover mishmash. The typical stucture seems to be either a rock song interjected with hip hop lyrics or a hip hop song interjected with vocals from a rock singer. Often with a dancable beat if not outright mixed by a dance DJ.
Some examples:
Payphone - Maroon 5 feat Wiz Khalifa
Princess of China - Coldplay feat Rhihanna
The Fighter - Gym Class Heroes feat Ryan Tedder (of OneRepublic)
Stereo Hearts - Gym Class Heroes feat Adam Levine (of Maroon 5)
Gettin’ Over You - David Guetta & Chris Willis feat Fergie & LMFAO