Question: Youthquake is the second album by the British pop group Dead or Alive, released in May 1985, the album was their commercial breakthrough in Europe and the United States, due to which lead single, which was the song was the first UK number-one hit by the Stock Aitken Waterman production trio?

Context articles: Pop Life (Bananarama album)
Please Yourself
Disco in Dream
Love, Truth and Honesty
You Spin Me Round (Like a Record)
Wow! (Bananarama album)
Youthquake (album)
Lover Come Back to Me (Dead or Alive song)
I Don't Believe In Miracles
Boy Krazy (album)

Pop Life is the fifth studio album by British girl group Bananarama, released in 1991.
 It is the only album released which features Jacquie O'Sullivan, who replaced Siobhan Fahey in Bananarama upon her departure in 1988.
 This album marks the end of the group's association with the Stock Aitken Waterman production team (they produced only two songs) as most of "Pop Life" was produced by Youth (real name Martin Glover).
 UK singer Zoë provided backing vocals on "Long Train Running".
 This would be the last album by Bananarama as a trio.
Please Yourself is the sixth studio album by British girl group Bananarama.
 It was released in 1993 by London Records, the last release the group had on this label.
 It is also the first album from Bananarama as a duo – with original members Sara Dallin and Keren Woodward continuing after the departure of Jacquie O'Sullivan the previous year and the last to feature both Sara Dallin and Keren Woodward to play bass guitar on some tracks on the album.
 "Please Yourself" also reunites Bananarama with two-thirds of the Stock Aitken Waterman production team (Stock and Waterman).
 Musician Gary Miller was brought in to do keyboards and guitar and would be Bananarama's next collaborator on their next album "Ultra Violet".
 The concept of the album was first suggested by Pete Waterman as 'ABBA-Banana', a record that would feature pop songs in the style of ABBA, but updated for the 1990s.
Disco in Dream is the debut concert tour by Australian recording artist Kylie Minogue.
 Although headlined by Minogue, the tour was an ensemble show alongside fellow Stock Aitken Waterman acts Sinitta and Dead Or Alive and supported her first two studio albums, "Kylie" (1988) and "Enjoy Yourself" (1989).
 The tour took place in Asia, later travelling to Europe re-titled as 'The Coca-Cola Hitman Roadshow' with a different line up of PWL and Stock Aitken Waterman artists such as Big Fun and Sonia.
 The shows were free to "thank British fans for their support" and targeted towards fans under the age of 18.
"Love, Truth and Honesty" is a song written and recorded by English girl group Bananarama.
 It was the first single released to promote the group's "Greatest Hits Collection" in 1988.
 The song was co-written and produced by the Stock Aitken Waterman (SAW) trio and was the last single Bananarama would write with Stock Aitken Waterman.
"You Spin Me Round (Like a Record)" is a song by British band Dead or Alive on their 1985 album "Youthquake".
 The song was the first UK number-one hit by the Stock Aitken Waterman production trio.
 Released in November 1984, the record reached number one in March 1985, taking 17 weeks to get there.
 On the US "Billboard" Hot 100, it peaked at no. 11 on 17 August of that year.
 In 2015 the song was voted by the British public as the nation's 17th favourite 1980s number one in a poll for ITV.
 Musician and actor Gary Kemp described the song as "one of the best white dance records of all time".
WOW!
 is the fourth album by Bananarama, released in September 1987.
 The album was entirely produced and co-written with the Stock Aitken Waterman production trio and is the last album by the girl group to generate significant chart hits in the US.
 Tensions between group member Siobhan Fahey and Stock, Aitken and Waterman regarding songwriting input and lyrical content (particularly with the track "Strike it Rich" ) prompted Fahey's departure from Bananarama months after its release.
 By the time the album's fourth single, "I Want You Back", was released, Fahey had been replaced with Jacquie O'Sullivan, who re-recorded the vocals for the single version of the song.
 Fahey would resurface in 1988 with her new band, Shakespears Sister.
Youthquake is the second album by the British pop group Dead or Alive, released in May 1985.
 The album was their commercial breakthrough in Europe and the United States, due to the lead single "You Spin Me Round (Like a Record)", which was a UK number-one hit and a top 20 hit in the United States.
 Additional single releases from the album included "Lover Come Back To Me", "In Too Deep" and "My Heart Goes Bang (Get Me to the Doctor)".
 This was Dead or Alive's first collaboration with the Stock Aitken Waterman production team.
 "Youthquake" was re-released in the UK on compact disc in 1994, with the two bonus tracks that were previously included on the original CD and cassette versions of the album.
"Lover Come Back to Me" is a 1985 single by Dead or Alive, produced by Stock Aitken Waterman.
 It was released as the second single from the band's second album, "Youthquake", and the single mix features slightly different instrumentation to the album version but is generally the same.
 The single peaked at #11 in the UK, #3 in South Africa, #21 in Germany, #13 in Australia and #75 on the US "Billboard" Hot 100.
"I Don't Believe In Miracles" is a song by American-British singer Sinitta.
 It was released in September 1988 as the first single from her second album "Wicked".
 This song was written and produced by Stock Aitken Waterman, and was successful in the UK where it was a top 30 hit (peaking at #22).
 This song was also her last single produced by Stock Aitken Waterman.
 After this release, Sinitta moved away from working directly with Stock Aitken Waterman although she continued to record at PWL under the direction of mixmasters Pete Hammond, Phil Harding and Ian Curnow.
Boy Krazy is the self-titled debut of girl group Boy Krazy.
 This was the only album the group made.
 It was produced by Mike Stock and Pete Waterman, except "That's What Love Can Do" and "Good Times with Bad Boys", which are a Stock Aitken & Waterman production.
 Each member sings the lead vocals on at least two songs on the album.
 The album includes many tracks originally written for Kylie Minogue had Minogue stayed on Stock Aitken & Waterman's PWL label.