Question: Which band top the UK charts with their singles "Chelsea Dagger" and "Whistle for the Choir": The Fratellis or The Madden Brothers?

Context paragraphs:
Benji Madden: Benjamin Levi "Benji" Madden (born Benjamin Levi Combs on March 11, 1979) is an American guitarist, vocalist, songwriter, and producer.  He is the lead guitarist and backing vocalist for the band Good Charlotte, as well as pop rock collaboration The Madden Brothers.  He formed both of these acts with his identical twin brother, Joel Madden.  Benji is currently a coach on "The Voice Australia".

Before — Volume One: Before — Volume One is a 2011 mixtape, presented by Complex, released by The Madden Brothers which consists of Joel Madden and Benji Madden, who are best known as the lead vocalist and guitarist, respectively, for the American pop punk band Good Charlotte.  The Madden Brothers say that their "only real objective for doing this mixtape was to have fun and be creative".  The tracks from the mixtape each feature at least one guest artist, except track 12, "A Million Tears (One Heart)".

B*Witched discography: The discography of B*Witched, an Irish pop girl group, consists of two studio album, one extended play and one compilation.  The group released their debut single "C'est la Vie" on 25 May 1998.  Despite mixed reviews, it reached Number 1 on the UK charts, making them the youngest female group ever to do so, and also made Number 9 in the US.  Subsequent singles "Rollercoaster", "To You I Belong" and "Blame It on the Weatherman" also topped the UK charts.  The group's debut album, "B*Witched", was released in October 1998, reaching Number 3 in the UK charts and was certified Double Platinum in the UK and Platinum in the US.  B*Witched's second album, "Awake and Breathe", released almost exactly a year after their debut, peaked at Number 5 on the charts and was certified Platinum.  Singles from the album were less successful than earlier releases ("Jesse Hold On" reached Number 4, "I Shall Be There" Number 13 and "Jump Down" Number 16 in the UK).  The latter two appeared on their new American EP, "Across America 2000", along with live tracks and the earlier cover of "Does Your Mother Know".  However, in September 2002, the group officially split when O'Carroll decided to leave the band.

The Madden Brothers: The Madden Brothers are an American pop rock duo made up of brothers Joel Madden and Benji Madden, both of whom are also founding members of the rock band Good Charlotte.

Costello Music: Costello Music is the debut album by Scottish rock band The Fratellis.  It was released on 30 October 2006 on Fallout Records and Drop the Gun Recordings and on 13 March 2007 on Cherrytree Records in the U.S. and was a success, peaking at #2 in the UK Albums Chart and spent 83 weeks in the Top 100.  It debuted behind "FutureSex/LoveSounds" by Justin Timberlake and stayed in the #2 position for two more weeks, this time behind "Ta-Dah" by Scissor Sisters.  The album had five single releases, as well as the download-only EP "Flathead". " Chelsea Dagger" was the most successful single, peaking at #5 in the UK and #4 in the Netherlands, but the other singles failed to chart in most countries.

Joel Madden: Joel Rueben Madden (born Joel Rueben Combs; March 11, 1979) is the lead vocalist for the American pop punk band Good Charlotte, as well as a record producer, actor, DJ, and UNICEF Goodwill Ambassador.  He is also part of the pop rock collaboration The Madden Brothers with his twin brother Benji Madden.

The Fratellis: The Fratellis are a Scottish rock band from Glasgow, formed in 2005.  The band consists of lead vocalist and guitarist Jon Fratelli (born John Lawler), bass guitarist Barry Fratelli (born Barry Wallace), and drummer and backing vocalist Mince Fratelli (born Gordon McRory).  Their singles "Chelsea Dagger" and "Whistle for the Choir" were both top ten hits in the UK charts.

The Fratellis (EP): The Fratellis EP was the debut EP released on 3 April 2006 by Scottish band The Fratellis.  There are a limited number of physical copies of this available in the UK.  "Creepin’ Up The Backstairs" was ineligible for the UK charts because the EP was limited in numbers and contained stickies.  Although it was not released as a single, there has been a video recorded for "Creepin’ Up the Backstairs", which is viewable on The Fratellis website and YouTube.

Whistle for the Choir: Whistle for the Choir is a song by the Fratellis, and their third single.  It was released on 27 November 2006 and reached number 9 in the UK Singles Chart, marking their second UK Top 10 single.  The song was originally titled "Knickers in a Handbag" but was changed due to pressure from the label.  The artwork points toward the old name by showing a girl on the cover handling a pair of knickers above a handbag.

Chelsea Dagger: "Chelsea Dagger" is a song by Scottish rock band The Fratellis.  It was released as the second single from their debut studio album, "Costello Music" (2006), on 28 August 2006.  It is named after Jon Fratelli's wife Heather, a burlesque dancer whose stage name – a play on Britney Spears – he borrowed for the song.  Fratelli described the tune as "a rock 'n' roll gig in an old speakeasy or something like that."

Supporting paragraphs: The Fratellis The Madden Brothers
Answer: The Fratellis