Chances are, you had to:
Investigate to find out the song's title:
(Disturbia, Waitin on a Woman, Makes Me Wonder)
Investigate to find out who performed the song:
(Rihanna, Brad Paisley, Maroon 5)
Investigate to find out what CD that song was on:
(Good Girl Gone Bad, 5th Gear, It Won't Be Soon Before Long)
Investigate to find out where...or if...you could buy that CD, or mp3s from it.
You can't - and won't - get what you want without investigating.
And it's really no different with researching. To find what you want and need, you will have to investigate.