How to expand 50 cent's brand

There was a time, believe it or not, when 50 Cent was just a rapper.

Sure, the multiplatinum-selling emcee has a new album, "Street King Immortal," due out this month. But that album is but one small part of the Curtis Jackson Empire, which already includes publishing (he appears at the Fifth Ave. Barnes & Noble tomorrow to talk about his new book, "Formula 50"), acting, fashion (G-Unit Sportswear) and beverages (SK Energy Shots).

Even with all of those products, though, it feels like 50 Cent is leaving money on the table. What else could the mogul hawk?

amNewYork has some ideas for the rap superstar to consider ...

50 Cent Microwave Beef Bowl
Who better to promote a bowl that allows someone to have beef anytime, anywhere and with anyone than the master of the public feud?

50 Cent Sunglasses
Several sources claim that the rivalry between Rick Ross and 50 Cent started when Fitty looked at the ex-correction officer wrong. Make sure to stay on the good side of emcees everywhere with shades to hide your disrespectful eyes.

50 Cent Birthday Cards
After all the product-hawking stops, the beefs end and the career of Curtis Jackson is evaluated, it may all come back to one of the biggest hits of the past decade, "In Da Club." So what better way to remind your shawty that it is, in fact, her birthday, than 50-themed greetings?

If you go: 50 Cent will be signing copies of his book "Formula 50: A Six-Week Workout and Nutrition Plan That Will Transform Your Life" Wednesday at 12:30 p.m. at Barnes & Noble Fifth Avenue, 555 Fifth Ave., 212-697-3048. This is a wristband event and you must purchase the book at the store. Limit three books per customer. He will be signing only the book.