Jennifer Lopez is set to expand her fashion empire by launching a luxury T-shirt company online.

The superstar quit her job as a judge on American Idol last week to focus on other projects, and she has already lined up her first post-TV venture in

The website, co-founded by Lopez and Internet entrepreneur Brian Lee, will offer up top quality T-shirts featuring both limited edition and basic designs for men and women, with items starting at $20 each.

The singer/actress is no stranger to the fashion industry - she launched her J.Lo by Jennifer Lopez lifestyle brand in 2001 and has created a line of clothes for retailer Kohl's.

Lee is known for helping celebrities take advantage of the world wide web - he teamed up with reality TV star Kim Kardashian to create her business, while he most recently joined forces with actress Jessica Alba to launch baby product website