Chances are, you had to:
Investigate to find out the song's title:
(E.T., The Lazy Song, Born This Way, Latinoamérica)
Investigate to find out who performed the song:
(Lady Gaga, Bruno Mars, Katy Perry, Maroon 5, Kanye West, Calle 13)
Investigate to find out what CD that song was on:
(Teenage Dream, Doo-Wops & Hooligans, Born This Way, Entren Los Que Quieran)
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.
Photos source: Amazon.com