Title: Suddenly (Olivia Newton-John and Cliff Richard song)
Content:  "Suddenly" is a duet performed by Olivia Newton-John and Cliff Richard from the soundtrack Xanadu, and is the love theme from the 1980 film of the same name. It was written and produced by John Farrar. "Suddenly" reached number 15 on the UK Singles Chart in October 1980 and number 20 on the US Billboard Hot 100 in January 1981. It was also a major Adult Contemporary hit, reaching number four. The music video shows them in a penthouse singing the song to each other taken from her ABC TV special "Hollywood Nights" that aired before the 52nd Academy Awards on April 14, 1980. The single's B-side, "You Made Me Love You" (Olivia solo), was also featured in the film Xanadu but does not appear on the soundtrack album.
Title: Suddenly (Olivia Newton-John and Cliff Richard song)
Content: 1) "Suddenly" – 4:03 ; 2) "You Made Me Love You" (Olivia Newton-John) – 3:04 7-inch vinyl single
Title: Suddenly (Olivia Newton-John and Cliff Richard song)
Content:  The song was covered by Filipino singers Sam Milby and Toni Gonzaga on their debut studio album Love Duets (2009).
Title: Suddenly (Olivia Newton-John and Cliff Richard song)
Content: Olivia Newton-John – vocals ; Cliff Richard – vocals ; John Farrar – guitar and synthesizer ; David McDaniel – bass ; Ed Greene – drums ; Michael Boddicker – vocoder ; Jai Winding – electric piano ; Richard Hewson – orchestra conductor 
Title: Suddenly (Billy Ocean song)
Content:  "Suddenly" is a popular song from 1985 co-written and performed by the Trinidadian-born, British-based singer Billy Ocean. Co-written and produced by Keith Diamond, it is the title track to Ocean's 1984 breakthrough album. Released as the third single from the album (following the success of "Caribbean Queen" and "Loverboy"), the ballad became the album's most successful single in the UK, reaching number four on the UK Singles Chart in mid-1985. The song also reached the same chart peak on the Billboard Hot 100 chart in the US, spending two weeks at number four in June of that year. It peaked at number five on the Billboard R&B chart and spent two weeks at number one on the Billboard adult contemporary chart.
Title: Banks of the Ohio
Content:  Olivia Newton-John recorded an arrangement of the song by John Farrar and Bruce Welch in 1971, for her album If Not for You. It was released as the second single from the album and was successful in the UK, peaking at number six. It was her first number one hit in Australia and reached number nine in South Africa but failed to reach the top forty in Canada and the US, peaking at number sixty-six and ninety-four, respectively. The distinctive bass backing vocals were provided by English musician and vocal session arranger Mike Sammes.
Title: Suddenly (Angry Anderson song)
Content:  "Suddenly" is a song recorded by Australian singer Angry Anderson for his debut solo album, Beats from a Single Drum. The track was first released via Mushroom Records in Australia during July 1987. It was written by Anderson, Andy Chicon and Kevin Beamish, with the latter serving as the song's producer. "Suddenly" was used in the Australian soap opera Neighbours during an episode that featured a wedding. It was selected by Neighbours cast member Kylie Minogue, who thought the song was lyrically "beautiful". The song's release coincided with the broadcast and it reached number two on the ARIA Singles Chart. "Suddenly" peaked at number three on the UK Singles Chart. In addition the song also charted in the European countries Ireland, Belgium and Netherlands. In 2012, Anderson stated that "Suddenly" is the best song he has ever written.
Title: Olivia Newton-John
Content:  won, a trip to Great Britain, but travelled there nearly a year later after her mother encouraged her to broaden her horizons. Newton-John recorded her first single, "Till You Say You'll Be Mine", in Britain for Decca Records in 1966. While in Britain, Newton-John missed her then-boyfriend, Ian Turpie, with whom she had co-starred in an Australian telefilm, Funny Things Happen Down Under. She repeatedly booked trips back to Australia that her mother would subsequently cancel. Newton-John's outlook changed when Pat Carroll moved to the UK. The two formed a duo called "Pat and Olivia" and toured nightclubs in Europe. (In one incident, they were booked at Paul Raymond's Revue in Soho, London. Dressed primly 
Title: Olivia Newton-John
Content:  nationally during the network's fund-raising pledge drives. In 2008, Newton-John took part in the BBC Wales program Coming Home about her Welsh family history. Also, in 2008, Newton-John joined Anne Murray on Murray's last album, titled "Duets: Friends and Legends". Newton-John sang Gordon Lightfoot's hit, {Cotton Jenny} with Murray. In 2009, Newton-John appeared on Andrea Bocelli's holiday album My Christmas and PBS TV holiday special My Christmas Special, with David Foster, Kenny Loggins and Richard Marx. In January 2011, Newton-John began filming the comedy A Few Best Men in Australia with director Stephan Elliott, in the role of mother of the bride. The groom is played by Xavier Samuel.
Title: Olivia Newton-John
Content:  At 14, Newton-John formed a short-lived all-girl group, Sol Four, with three classmates often performing in a coffee shop owned by her brother-in-law. She became a regular on local Australian radio and television shows including HSV-7's The Happy Show where she performed as "Lovely Livvy". She also appeared on The Go!! Show where she met future duet partner, singer Pat Carroll, and future music producer, John Farrar (Carroll and Farrar would later marry). She entered and won a talent contest on the television program Sing, Sing, Sing, hosted by 1960s Australian icon Johnny O'Keefe, performing the songs "Anyone Who Had a Heart" and "Everything's Coming Up Roses". She was initially reluctant to use the prize she 

Question: who sang the song suddenly with olivia newton john?
Answer: Cliff Richard.