Passage: Akon's three years in jail saw him begin to recognize his music abilities and develop an appreciation for his musical background. Music mogul Devyne Stephens, president of Upfront Megatainment first heard about Akon when the rapper Lil' Zane brought him along to Stephens' rehearsal hall, a place that at the time saw talents such as Usher and TLC being developed. The relationship between Stephens and Akon began as a friendship and mentorship, with the young artist regularly stopping by to ask for advice, with Stephens eventually signing him to his production company and began grooming him professionally.  The songs Akon recorded with Stephens were brought to the attention of Universal's imprint SRC Records. In an interview with HitQuarters SRC A&R Jerome "Knobody" Foster said, "What caught my attention right away was "Lonely", and I said, 'this kid is official – this is a huge record." Foster and SRC CEO Steve Rifkind immediately boarded a private plane to Atlanta to meet the young artist. Akon knew of Foster's work as producer Knobody and so there was a mutual respect for one another and the pair hit it off.Akon's solo debut album, Trouble was released on June 29, 2004. It spawned the singles "Locked Up" and "Lonely", "Belly Dancer (Bananza)", "Pot Of Gold", and "Ghetto". "Locked Up" reached 8th position in the U.S. and 5th in the UK. "Ghetto" became a radio hit when it was remixed by DJ Green Lantern to include verses from rappers 2Pac and The Notorious B.I.G.  The album is a hybrid of Akon's silky, West African-styled vocals mixed with East Coast and Southern beats. Most of Akon's songs begin with the sound of the clank of a jail cell's door with him uttering the word "Konvict".In 2005, he released the single "Lonely" (which samples Bobby Vinton's "Mr. Lonely"). The song reached the top five on the Billboard Hot 100, and topped the charts in Australia, the UK and Germany. His album also climbed to number one in the UK in April 2005. When music channel The Box had a top ten weekly chart, which was calculated...

Question: In what year did the album soar to the number one in the United Kingdom?
2005