In the summer of 2004, Wayne's album Tha Carter was released, marking what critics considered advancement in his rapping style and lyrical themes. In addition, the album's cover art featured the debut of Wayne's now-signature dreadlocks. Tha Carter gained Wayne significant recognition, selling 878,000 copies in the United States, while the single "Go DJ" became a Top 5 Hit on the R&B/Hip-Hop chart. After the release of Tha Carter, Lil Wayne was featured in Destiny's Child's single "Soldier" with T.I., which peaked at No. 3 on the Billboard Hot 100 and the Hot R&B/Hip-Hop Songs charts.  Tha Carter II, the follow-up to the original Tha Carter album, was released in December 2005, this time without production by longtime Cash Money Records producer Mannie Fresh, who had since left the label. Tha Carter II sold more than 238,000 copies in its first week of release, debuting at No. 2 on the Billboard 200 albums chart, and went on to sell 2,000,000 copies worldwide. The lead single "Fireman" became a hit in the US, peaking at 32 on the Billboard Hot 100 chart. Other singles included "Grown Man" with Currensy, "Hustler Musik", and "Shooter" with R&B singer Robin Thicke. Lil Wayne also appeared on a remix of Bobby Valentino's "Tell Me", which rose to No. 13 on the U.S. R&B Charts. In 2005, Lil Wayne was named president of Cash Money, and in the same year he founded Young Money Entertainment as an imprint of Cash Money. However, as of late 2007, Lil Wayne reported that he has stepped down from the management of both labels and has handed management of Young Money over to Cortez Bryant.  In 2006, Lil Wayne collaborated with rapper Birdman for the album Like Father, Like Son, whose first single "Stuntin' Like My Daddy", reached No. 21 on the Billboard Hot 100.

Answer this question "What happened in 2004?" by extracting the answer from the text above.
In the summer of 2004, Wayne's album Tha Carter was released,