Question: What song was the last number 1 hit on Hit40UK and performed by the Black Eyed Peas?

Context paragraphs:
Fergalicious: "Fergalicious" is a song recorded by American singer and rapper Fergie for her debut studio album, "The Dutchess" (2006).  The title is a portmanteau of "Fergie" and "delicious".  It was written by Fergie and The Black Eyed Peas groupmate will.i.am, who also produced the song as well as providing the instrumentation and additional vocals.  The song was slated as the second single from the album and released for airplay on October 23, 2006.  "Fergalicious" is an dance, electro and hip hop song with R&B characteristics.  It contains compositional samples of "Supersonic", a song written by Dania Maria Birks, Juana Michelle Burns, Juanita A. Lee, Kim Nazel, and Fatima Shaheed and performed by J. J. Fad, and "Give It All You Got", a song written by Derrick Rahming and popularized by Afro-Rican.  The song's bridge contains an interpolation of "Night Train" by Jimmy Forrest and James Brown.  The critical reception of "Fergalicious" was positive, with many praising it as a catchy and danceable track.  Some music critics compared the song to "My Humps" (2006), a single released by The Black Eyed Peas from their fourth studio album "Monkey Business" (2005).

Hit40UK: Hit40UK was a networked Top 40 chart show broadcasting on around 130 UK commercial radio stations every Sunday from 4pm to 7pm.  It is now a TV programme shown on 4Music.  The radio version was produced in house by Global Radio (formerly GCap Media) and Somethin' Else.  The show was cancelled on 7 June 2009 and the last ever number 1 single was Boom Boom Pow by The Black Eyed Peas, played at 6:52pm.

The Black Eyed Peas: The Black Eyed Peas (originally simply Black Eyed Peas) are an American group, consisting of rappers will.i.am, apl.de.ap, Taboo, and Fergie.  Originally an alternative hip hop group, they subsequently changed their musical sound to pop and dance-pop music.  Although the group was founded in Los Angeles in 1995, it was not until the release of their third album "Elephunk" in 2003 that they achieved high record sales.  Since that time, the group has sold an estimated 76 million records (35 million albums and 41 million singles), making them one of the world's best-selling groups of all time.  According to Nielsen SoundScan, The Black Eyed Peas were the second-best-selling artist/group of all time for downloaded tracks, with over 42 million sales as of the end of 2011.

Bridging the Gap (Black Eyed Peas album): Bridging the Gap is the second studio album by American hip hop group Black Eyed Peas, released on September 26, 2000.  This is their last album as "Black Eyed Peas", before they changed their name to "The Black Eyed Peas".

La Paga: "La Paga" is a song written and performed by Colombian singer-songwriter Juanes.  It's the fifth of six radio singles from his second solo studio album, "Un Día Normal".  "La Paga" can also be found on the compilation album "2005 Año de Exitos", which also features hit singles by Paulina Rubio, Luis Fonsi, and David Bisbal, among many other artists.  The remix features rapper Taboo and occasionally will.i.am, both from The Black Eyed Peas.  The remix can be found on The Black Eyed Peas album "Elephunk" Bonus Track Version, and Juanes albums, "Mi Sangre Tour Edition (2005)", "Mi Sangre (2005 Double Disc Version)", and "Mi Sangre European Tour Edition".  "La Paga" contains a sample of Buena Vista Social Club's "Candela".

Sylvain Cossette: Sylvain Cossette (born May 8, 1963) is a French-Canadian singer-songwriter from Grand-Mère, Quebec (located in the Mauricie region).  Sylvain was a founding member of the Quebec-based English language band Paradox in 1984, before becoming a French language solo artist by 1994.  During his career he has sold over one million albums (12 Gold and Platinum), recorded thirty-two #1 hit songs and eight Number 1 albums, earned six Silver, Gold and Platinum Tickets, won 10 Quebec Felix Music Awards, six Socan awards and four Juno nominations, and performed in Canada and Europe in the hit stage musicals "Notre Dame De Paris" and "Dracula".  Cossette's 2001 album "Rendez-vous" was certified Platinum by the CRIA in November 2002.  His 2007 album "70s" (#1 Quebec, #2 Canada) is his first all English release and produced four Number 1 hit singles and two Number 1 hit videos.  The album went Gold (50,000 CDs sold) in 27 days and Platinum (100,000 CDs sold) in 15 weeks.  The 70s concert tour went Silver Ticket (25,000 tickets sold) in three months and Gold Ticket (50,000 tickets sold) within a year.  On October 21, 2008, he released the album "70s Volume 2" and produced three Number 1 hit singles and one Number 1 hit video.  The album went Gold (50,000 CDs sold) in 19 days and Platinum (100,000 CDs sold) in 11 weeks.  On October 25, 2010, the album 70s Volume 3 was released and quickly went Gold.  The 70s project has so far sold almost 400,000 albums, 150,000 concert tickets and been seen by over a 650,000 people at outdoor festivals.  In September 2011 he launched his new one-year tour «The Best of the 70s».  In October 2011, two compilation albums were released of his greatest French language hits.  On October 1, 2012, he release his first original French language album in 12 years called "Le jour d'après" (4 number one hit songs) which he wrote, co-arranged and co-produced.  His next album RETROSPECTIVE spawned a tour throughout French Canada in 2013-2014.  In April 2014 he released an album "Les numérous 1" of his career #1 hit songs that he composed.  A new trilogy project (album/photobiography book/tour) called ACCORDS was released in October 2014 and spawned three Number 1 hit singles followed by a tour throughout French Canada in 2015.  In 2014-16 he was the creative force behind two children projects (albums and live shows): Lily et le Lutin & Pyjama Party.  In 2017 he released his first instrumental album Café et Guitares in over 200 countries.

Boom Boom Pow: "Boom Boom Pow" is a song by The Black Eyed Peas released as the lead single from their fifth studio album, "The E.N.D".

The Dutchess: The Dutchess is the debut studio album by American singer Fergie.  It was released on September 23, 2006 through A&M Records and the will.i.am Music Group as her first solo album since the break from her band The Black Eyed Peas.  The album was recorded between The Black Eyed Peas' tour in 2005, and the songs were written throughout the last eight years that preceded its release.  While developing the album, Fergie wanted to create an autobiographical album that would be more intimate between her and the listener.  By doing so, the album experiments with different music genres, including pop, hip hop, R&B, reggae, punk rock and soul.  Lyrically, "The Dutchess" has themes about love and critics, while also dealing with her drug abuse and addiction.

Riddim Ribbon feat. The Black Eyed Peas: Riddim Ribbon featuring The Black Eyed Peas is the first installment in Tapulous' new series of music games, succeeded by Riddim Ribbon Free.  It features three tracks by The Black Eyed Peas plus more tracks that can be purchased from Apple's in-app purchase.

Pump It: "Pump It" is a 2005 song by The Black Eyed Peas.  It was released as the fourth and final single from The Black Eyed Peas' 2005 album "Monkey Business".  This song was also remixed for the deluxe edition of the group's fifth studio album "The E.N.D" as "Pump It Harder".  "Pump It" heavily incorporates music from Dick Dale's 1962 surf version of the song "Misirlou" (known by many for being featured in the 1994 Quentin Tarantino film "Pulp Fiction").  "Miserlou" (sometimes rendered "Misirlou") is a popular folk song of Eastern Mediterranean origin, with an Egyptian version dating back to 1919, and a Greek version of 1927 which is believed to have been written by Tetos Dimitriadis, the arrangement of which is credited to Nicholas Roubanis for his 1941 released jazz version.

Supporting paragraphs: Hit40UK Boom Boom Pow
Answer: Boom Boom Pow