The type of licensing you will need to inquire about is synchronization licensing.
To include music as part of a video, slideshow or film, you may need the permission of both the music publisher and the record label. A music publisher owns the song (that is the words and music) and a record company owns the sound recording (that is, what you hear, the artist singing, the musicians playing, the entire production).
Check BMI
http://www.bmi.com/search/, and SESAC
http://www.sesac.com/repertory/repertory_main.asp. For other assistance with locating publishers you can also try the Music Publishers Association at
http://www.mpa.org.
The name and address of the record company should appear on the record label. For more information on the rights of record labels you may want to contact the Recording Industry Association of America (
www.riaa.com), a trade organization for record labels, 1020 19th Street, N.W., Suite 200, Washington, DC, 202-775-0101.