Throughout his early solo career, Warren G worked with artists like MC Breed and 2Pac, but his big break came when his vocal collaboration with Mista Grimm, on "Indo Smoke", appeared on the Poetic Justice soundtrack in 1992. His outstanding rap lead to a serious collaboration with Dr. Dre. Dedicated to hard work, that same year, Warren G made major contributions to Dr. Dre's album The Chronic, released in December 1992, including sampling for "Nuthin' but a G-Thang". Worldwide recognition as a solo artist came immediately after Warren G dropped the smash hit "Regulate"; a duet with Nate Dogg, which topped the charts in 1994. The accompanying album Regulate...G Funk Era went triple platinum with "This D.J." becoming his second Top 20 hit. One year after its release, the album had sold four million copies worldwide, with three million of those sold in the US (certified 3x platinum). Had Warren G signed with Death Row, he would have been one of the label's biggest selling acts at the time. 1994 would also see Warren G doing a track with former NBA Slam Dunk Champion and NBA All-Star Cedric Ceballos on B-Ball's Best Kept Secret a rap album with tracks done almost exclusively by early 1990s NBA players. He would score a #2 hit on the UK singles chart with Adina Howard with "What's Love Got to Do With It", from the soundtrack album to the movie Supercop. Warren G's second album was entitled Take a Look Over Your Shoulder (Reality) and was released in 1997. It featured two singles: The hit "I Shot the Sheriff "(US #20, UK#2), a gold single in the US; and "Smokin' Me Out" (US #35, UK#14). The album would be certified gold in America. Together with the Norwegian superstar soprano Sissel Kyrkjebø, Warren G had a hit in several European countries in 1998 with "Prince Igor" on the concept album The Rapsody Overture. The album combined American rappers with European opera singers. Sissel sang an aria from Borodin's opera Prince Igor during the chorus, while Warren rapped. Warren G had signed to the independent label Restless Records by the release of his third album I Want It All in 1999. The album offered a jazz-rock fusion style and featured a host of guests including Snoop Dogg, Mack 10, Kurupt, and Eve. The first single, "I Want It All" (US #23), sampled the song "I Like It" by DeBarge. Second single "Game Don't Wait" peaked at #58 on the US R&B Chart. The album was certified gold in the US.