50 Cent

Please don't interrupt me 
When I'm talkin' to my jeweler

He's puttin' them diamonds 
All over my Franck Muller

From "OK, You're Right," the lead single from his 2009 album, Before I Self Destruct.

Rappers loves expensive watches.  A search of http://www.rapgenius.com/ for various high-end watch brand names turned up 84 mentions of Rolex, 44 mentions of Audemars Piguet, and 15 mentions of Breitling, just to name a few.  

Franck Muller is a Swiss luxury watch I was not familiar with, but it seems to be 50 Cent's favorite.  Muller watches carry the slogan "Master of Complications."  A "complication" is a watchmaking term meaning something that a watch does in addition to telling you the time -- e.g., day, date, year, phase of the moon, etc.  

Muller's Aeternitas Mega 4 has 36 complications, making it the most complex watch ever made.  It sells for $2.7 million, but you can get a simpler Franck Muller watch for less than $10,000.