I have to admit that I can't get Drop It Like It's Hot out of my head. Taken at face value it reminds me of the old school beats used by Audio Two in their hit "Top Billin".
Dir en grey - Keroido Milk, Precious (live), Setsuna (live)
Plastic tree - Harusaki Sentimental
MUCC - Black Smoke
Hyde - Words of Love
Malice Mizer - S-conscious
Miyavi - just about god damn everything but especially Girls be ambitious, Oresama Shikou, Ossan Ossan Ore Nanbo, Gariben Rock, Shoukyoto Sakujyo, Peter Pan syndrome, and random-song-I-don't-know-the-name-of-but-it-ing-rocks.