Question: Purple Rain is a song by Prince and The Revolution, it reached number 2 in the United States for how long, behind Wake Me Up Before You Go-Go, a song by the British duo Wham!?
Context: "Computer Blue" is the fourth track on Prince and the Revolution's soundtrack album, "Purple Rain".  In the film, the song represents Prince's angst at the budding relationship between the characters played by Morris Day and Apollonia.  The song was composed by Prince, with credit to his father, John L. Nelson for the guitar solo based on a piano instrumental written by Nelson and Prince.  Prince titled the piece "Father's Song" and recorded it on piano for the film, though on screen it was portrayed as being played by Prince's on-screen father, actor Clarence Williams III.  On the box-set "Purple Rain Deluxe" (2017) a different and longer recording of "Father's Song" is included. "Paisley Park" is a 1985 song by Prince and The Revolution.  It was the first single released in some international markets from their 1985 album, "Around the World in a Day" and so is also the album's last single internationally.  "Paisley Park" was recorded before "Purple Rain" was completed, indicating the new direction Prince wanted to take after the success of that album and film.  Violin on the song was played by Novi Novog, and Wendy & Lisa provide backing vocals.  The rest of the song was performed by Prince.  The song reached the Top 40 in all of the countries it was released in.  It peaked within the Top 20 in both Ireland (No. 11) and the UK (No. 18) "Freedom" is a hit song by British pop duo Wham! .  It became the group's second number one hit on the UK Singles Chart and reached number three in America.  It was written and produced by George Michael, one half of the duo. "Let's Go Crazy" is a 1984 song by Prince and The Revolution, from the album "Purple Rain".  It was the opening track on both the album and the film "Purple Rain".  "Let's Go Crazy" was one of Prince's most popular songs, and was a staple for concert performances, often segueing into other hits.  When released as a single, the song became Prince's second number-one hit on the "Billboard" Hot 100, and also topped the two component charts, the Hot R&B/Hip-Hop Songs and Hot Dance Club Play charts, as well as becoming a UK Top 10 hit.  The B-side was the lyrically controversial "Erotic City".  In the UK, the song was released as a double A-side with "Take Me with U". Georgios Kyriacos Panayiotou (25 June 1963 – 25 December 2016), known professionally as George Michael, was an English singer, songwriter, record producer, and philanthropist who rose to fame as a member of the music duo Wham!  He was best known for his work in the 1980s and 1990s, including hit singles such as "Wake Me Up Before You Go-Go" and "Last Christmas", and albums such as "Faith" (1987) and "Listen Without Prejudice Vol.  1" (1990). Fantastic is the debut studio album by British pop duo Wham!  released on 9 July 1983.  It reached number one on the UK Albums Chart.  It included the previously released singles "Young Guns", "Wham!  Rap" and "Bad Boys". " Club Tropicana" was also released as a single, as was "Club Fantastic Megamix".  In the U.S., this album was originally released as the group "WHAM!  U.K.", due to a conflict with a U.S. group with the same name (Columbia BFC-38911). "Purple Rain" is a song by Prince and The Revolution.  It is the title track from the 1984 album of the same name, which in turn is the soundtrack album for the 1984 film of the same name, and was released as the third single from that album.  The song is a combination of rock, R&B, gospel, and orchestral music.  It reached number 2 in the United States for two weeks, behind "Wake Me Up Before You Go-Go" by Wham! , and it is considered to be one of Prince's signature songs. The Purple Rain Tour was the fifth concert tour by American recording artist Prince and The Revolution following up on the success of his sixth studio album "Purple Rain" and his 1984 film "Purple Rain".  According to "Spin", the tour sold over 1.7 million tickets. "Pop Life" is a 1985 song by Prince and The Revolution.  It was the second US (and final UK) single from their 1985 album, "Around the World in a Day", reaching number 7 in the US charts.  The song starts with a faded-in synth line and quickly starts the main tune.  The easy groove is achieved with a smooth bass guitar and piano embellishments.  A drum machine provides handclaps to make the song danceable.  "Pop Life" was recorded before "Purple Rain" was completed, indicating the new direction Prince wanted to take after the success of that album and film.  Drums on the song were played by Sheila E. in tandem with Prince's then-drummer Bobby Z., bass was played by Brownmark, keyboards were played by Matt Fink and Wendy & Lisa provide backing vocals in addition to guitar and keyboards respectively, Jonathan Melvoin played tambourine and the rest of the song was performed by Prince. "Wake Me Up Before You Go-Go" is a song by the British duo Wham! , first released as a single in the UK on 14 May 1984.  It became their first UK and US number one hit.  It was written and produced by George Michael.  The single was certified Platinum in the US, which at the time commemorated sales of over two million copies.
Answer: two weeks