Lil' Kim released her fourth album, "The Naked Truth", on September 27, 2005, while serving a federal prison sentence. It earned her a 5 mic rating from "The Source", making her the only female rapper to ever receive a 5 mic rating. The album debuted at number 6 on the "Billboard" 200 chart, selling 109,000 copies in its first week of release, giving Lil' Kim her third top 10 debut on the chart. "The Naked Truth" did not sell as well as her previous works, it only managed to reach a gold certification by RIAA. She said that her prison sentence left her with no time to promote the project. The music video for "The Naked Truth" first single, "Lighters Up", was number one on BET's "106 & Park" for two weeks. "Lighters Up" was a Top Ten hit on the "Billboard" Hot R&B/Hip-Hop Singles & Tracks chart. The single also reached number. 67 on the German Single Chart, number 12 on the UK Top 75 and number 4 on the Finland Single Chart. The second single, "Whoa" was released on February 17, 2006. It reached number 22 on Airplay.