Darkchild (Angel, When I Grow Up, Telephone)
Dr. Luke (Hot n Cold, Party in the U.S.A., 4ever)
Max Martin (Teenage Dream, So What, Behind These Hazel Eyes)
Timbaland's older material (Maneater, The Way I Are)
Toby Gad (Untouched, Scars, A Year Without Rain)
Tim James (See You Again, Chemicals React, Can't Be Tamed)
Timbaland back in the day with Aaliyah and Missy Elliot, then with Justin Timberlake with FutureSex/LoveSounds, hate everything he is been doing lately