Question: Maurizio Lobina created the piano riff for which hit song that was released on 15 January 1999?

Context paragraphs:
I Wanna Be Your Dog: "I Wanna Be Your Dog" is a 1969 song by the American rock band The Stooges.  The song is included on their self-titled debut album.  Its memorable riff, composed of only three chords (G, F♯ and E), is played continuously throughout the song (excepting two brief 4-bar bridges).  The 3-minute-and-9-second-long song, with its raucous, distortion-heavy guitar intro, pounding, single-note piano riff played by producer John Cale of The Velvet Underground, and steady, driving beat, established The Stooges at the cutting edge example of the heavy metal and punk sound.  The song notably uses sleigh bells throughout.

Maurizio Lobina: Maurizio Lobina (born 30 October 1973 in Asti) is an Italian musician and singer, most known as a member of the band Eiffel 65, an Italian group who hit big in 1999 with the mega-hit "Blue (Da Ba Dee)."  Lobina created the melody for the song "Blue" on a keyboard and asked vocalist Jeffrey Jey to "come up with strange lyrics" to accompany his piano riff.

Blue (Da Ba Dee): "Blue (Da Ba Dee)" is a song by the Italian music group Eiffel 65.  It was released on 15 January 1999 as the lead single from their debut album "Europop".  The song is the group's most popular single, reaching number one in many countries such as Ireland, the United Kingdom, the Netherlands, France, Sweden, Switzerland, New Zealand, Finland, Norway, Australia, and Germany, as well as reaching number six on the "Billboard" Hot 100 in the United States.  In the United Kingdom, the song originally entered the top 40 purely on import sales.  It was only the third single to do this.

Eiffel 65: Eiffel 65 is an Italian musical group consisting of Jeffrey Jey, Maurizio Lobina and Gabry Ponte.  They are known mainly for their high-charting singles, "Blue (Da Ba Dee)" and "Move Your Body", and their 1999 studio album "Europop".  Their next two albums, "Contact! " (2001) and their 2003 self-titled album, did not have much international success but still managed to chart in Italy.

Sugar (Flo Rida song): "Sugar" is a song by American rapper Flo Rida, featuring American pop/dance singer Wynter Gordon.  The song's chorus samples the song "Blue (Da Ba Dee)" by Italian electronic music group Eiffel 65.  The song was written by Flo Rida, The Jackie Boyz, Jeffrey Jey, Maurizio Lobina, and Massimo Gabutti, and was produced by DJ Montay for Flo Rida's second album, "R.O.O.T.S.".  The song was released as the album's third official single in March 2009 as a digital download.

Crash Test 01: Crash Test 01 is the debut album of Bloom 06.  The album was released on October 13, 2006.  The album was to be Eiffel 65's fourth album but Eiffel 65 members Jeffrey Jey and Maurizio Lobina left Bliss Corporation to pursue interests in their own production company.  The track "In the City", also the first single, is based on an Eiffel 65 song, "Living in My City" from their 2003 album "Eiffel 65".

Doctor My Eyes: "Doctor, My Eyes" is a 1972 song written and performed by Jackson Browne and included on his debut album "Jackson Browne".  Featuring a combination of an upbeat piano riff coupled, somewhat ironically, with lyric about feeling world-weary, the song was a surprise hit, reaching #8 on the Billboard Hot 100 in spring 1972, after debuting on the chart at #80.  Browne would not see the chart's Top 10 again until 1982's soundtrack hit "Somebody's Baby", although "Running on Empty" just missed the Top 10, reaching #11.  "Billboard" ranked "Doctor My Eyes" as the No. 92 song for 1972.  In Canada, the song peaked at number four.

Speed of Sound (song): "Speed of Sound" is a song by British rock band Coldplay.  It was written by all members of the band for their third studio album, "X&Y" (2005).  Built around a piano riff, the song builds into a huge, synthesiser-heavy chorus.  It was released by Parlophone Records as the lead single from the album.  "Speed of Sound" was released in the US on 18 April 2005, and then made its radio premiere on BBC Radio 1 with Lamacq on the day of the release on 19 April.  The single was pressed with two B-sides: "Things I Don't Understand" and "Proof".  The song premiered in the UK on 23 May.

Clocks (song): "Clocks" is a song by British rock band Coldplay.  It was written and composed, as a collaboration between all the members of the band, for their second album "A Rush of Blood to the Head".  Built around a piano riff, the song features cryptic lyrics concerning themes of contrast and urgency.  Several remixes of the track exist and its riff has been widely sampled.

Blue (Da Ba Dee) (music video): The music video for Eiffel 65's "Blue (Da Ba Dee)" was released in 1999 by the BlissCoMedia, a computer graphics company of the Bliss Corporation, known at the time the video was produced and released as "BlissMultiMedia".  The video featured computer graphics done in 3ds Max, and features Eiffel 65 members Maurizio Lobina and Gabry Ponte trying to save Jeffrey Jey from the aliens Zorotl and Sayok6.  The video was later uploaded to the Bliss Corporation's official YouTube channel on September 2, 2009, where, as of July 2017, it has more than 120 million views.

Supporting paragraphs: Maurizio Lobina Blue (Da Ba Dee)
Answer: Blue