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

"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". <SEP> "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". <SEP>  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. Hit40UK was a networked Top 40 chart show broadcasting on around 130 UK commercial radio stations every Sunday from 4pm to 7pm.  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. <SEP> 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.