"Rock Around the Clock" by Bill Haley and His Comets, "Smells Like Teen Spirit" by Nirvana and "Rehab" by Amy Winehouse are some famous pop songs. Whereas "Rock Around the Clock" is an early pop song from the 1950s, "Smells Like Teen Spirit" and "Rehab" are more recent hits.
Billboard and About.com each provide top 100 lists of the best pop songs of all time. These lists are a good starting point from which to explore famous pop songs from across the decades. The aforementioned songs feature in both lists and rank among the most famous pop songs ever recorded.