"Titanium" is a song by French DJ and music producer David Guetta, featuring vocals by Australian recording artist Sia.
 Taken from Guetta's fifth studio album, "Nothing but the Beat", the song was written by Sia, David Guetta, Giorgio Tuinfort and Afrojack.
 Production was also handled by Guetta, Tuinfort and Afrojack.
 "Titanium" was initially released for digital download on August 8, 2011, as the first of four promotional singles from the album.
 It was later released as the album's fourth single in December 2011.
 The song originally featured the vocals of American recording artist Mary J. Blige, whose version of the song leaked online in July 2011.
"Who's That Chick?"
 is a song by French DJ David Guetta from the reissue of his fourth studio album "One Love" (2009), entitled "One More Love" (2010).
 The song features guest vocals by Barbadian recording artist Rihanna and was written by Kinda "Kee" Hamid, David Guetta, Giorgio Tuinfort and Frédéric Riesterer, with production helmed by Guetta, Tuinfort and Riesterer.
 It was released internationally as the second single on 22 November 2010 as a digital single, and was also released as a CD single and an Extended play (EP), the latter of which was released in the United States and contained remixes of the song.
"Play Hard" is a song by French DJ and record producer David Guetta, featuring vocals from singers Ne-Yo and Akon, from the re-release of Guetta's fifth studio album, "Nothing but the Beat".
 This is the second collaboration between David Guetta and Akon since Sexy Chick in 2009.
 All three artists co-wrote the song with Frédéric Riesterer and Giorgio Tuinfort, both of whom produced the song with Guetta.
 Akon's vocals were written and recorded at Sonic Vista Studios in Ibiza in July 2012.
 The song samples the 1999 Eurodance song "Better Off Alone" by Alice Deejay and "In my Dreams (XXL Remix)" by Noemi.
 "Play Hard" peaked at number six on the UK Singles Chart, thus becoming his fourteenth top 10 hit in the UK as a lead artist.
 It also charted within the top 40 of the charts in several other countries.
"When Love Takes Over" is a song by French DJ-music producer David Guetta with vocals by Kelly Rowland from his fourth studio album, "One Love".
 It was released as the lead single from the album on 21 April 2009 by Virgin Records (EMI France).
 The song was conceived when Guetta played the instrumental version during one of his DJ sets in summer 2008; American recording artist Kelly Rowland, who fell in love with the track, convinced Guetta to allow her to take it so that she could write and record vocals for it.
 It was co-written by Nervo.
"Love Is Gone" is a song by French house DJ David Guetta and American singer Chris Willis.
 It is the second single from Guetta's third studio album "Pop Life".
 The single was released in France on June 2007 and in the UK on August 2007.
 The song reached #9 in the UK Singles Chart, becoming his second Top 10 hit.
 The song also received crossover airplay on top 40 radio stations in the USA, leading it to reach #98 on the Billboard Hot 100 singles chart.
 The song has been remixed by co-producers Frédéric Riesterer (as Fred Rister) & Joachim Garraud themselves, Eddie Thoneick, Fuzzy Hair and Amo & Navas.
 The Fred Rister & Joachim Garraud remix was the one of the first David Guetta productions to use its guitar sound, which was later used in the songs "I Gotta Feeling" by The Black Eyed Peas, and "Gettin' Over", which also featured Chris Willis (as well as the single version "Gettin' Over You" with Fergie and LMFAO).
 The music video of the song features the actress, Kelly Thiebaud.
Now That's What I Call Club Hits is a compilation album released on September 22, 2009.
 This is the first album in the U.S. "Now!
" series (and first "Now!"
 Dance compilation release outside Europe) to consist entirely of tracks and remixes made in the electronic dance music genre.
 Four tracks have reached number one on the "Billboard" Hot Dance Club Songs chart — "When Love Takes Over", "LoveGame", "Waking Up in Vegas" and "Wrong".
"Just for One Day (Heroes)" is a house song performed by French DJ David Guetta, and featuring vocals from singer David Bowie.
 The song was released as the lead single from Guetta's compilation album, "Fuck Me I'm Famous 2003" in June 2003, and was also credited as the fifth single from his debut studio album, "Just a Little More Love".
 The song contains a sample from Bowie's 1970s track, "Heroes".
 The track was officially credited to 'David Guetta vs. Bowie'.
 It peaked at No. 73 on the UK Singles Chart in July 2003.
 The music video for "Just for One Day (Heroes)" can be found on YouTube.
 It features a group of people partying at a rave, with Guetta performing the track in the background.
"Delirious" is a house song performed by French DJ David Guetta and Tara McDonald (McDonald also co wrote the song) for Guetta's third studio album, "Pop Life".
 The song was released as the album's fourth single on January 31, 2008.
 Several remixes of the song, including mixes by Fred Rister, Marc Mysterio, Laidback Luke, and Arno Cost and Norman Doray were released.
 A video clip for the song was filmed by Denys Thibaut in Montreal, featuring David Guetta and Tara McDonald, picturing an executive assistant (Kelly Thiebaud) throwing paint all over her boss's office.
"Repeat" is a song by French DJ David Guetta, featuring vocals from British recording artist Jessie J.
 Written by Jessie J, The Invisible Men, Ali Tennant, David Guetta, Giorgio Tuinfort, Frédéric Riesterer and produced by Guetta, Tuinfort, Riesterer, the song has thus far peaked at number 108 in UK Singles Chart.
"The World Is Mine" is a song by French DJ David Guetta, featuring vocals from singer JD Davis.
 The track was released as the third single from Guetta's second studio album, "Guetta Blaster" on 22 November 2004.
 It contains prominent samples from the Simple Minds song "Someone Somewhere in Summertime".
 Three years later, in 2007, the track was released as a single in the United States as the follow-up to "Love Don't Let Me Go (Walking Away)", along with the "Guetta Blaster" album.
 Thanks in part to support from Dance radio outlets like BPM, "The World is Mine" would end up giving Guetta his first number-one single on the "Billboard" Hot Dance Airplay chart in June 2007.
 The track was also the first single and only single from "Guetta Blaster" to be released in the United Kingdom.
 A music video for the track exists, where Guetta appears only for one second.

Question: What song on Now That's What I Call Club Hits was produced by David Guetta?
Answer: When Love Takes Over