[3] In early 2000, Costa and Duncan James convinced Lee Ryan and Simon Webbe to form the group Blue.

[4] Blue's R&B-influenced pop allowed the group to achieve commercial success in the United Kingdom and many other countries, including Ireland, Portugal, Belgium, Italy, France, Australia and New Zealand.

Costa worked on the song with songwriter John McLaughlin and performed live with Scottish session musician Paul Boyd.

In June 2006 Costa posed naked for Cosmopolitan magazine's "10 Years of Naked Male Centrefolds", alongside other stars including singer Ronan Keating, actor Danny Dyer, Labour MP Jim Devine, and TV presenter Craig Doyle.

From 10 April 2006, Costa played the lead role of Mickey Johnstone in the London production of the long-running musical Blood Brothers, directed and produced by Bill Kenwright; his contract ran to February 2007.

[7] His UK tour had eighteen dates, which started on 16 February 2008 at The Brindley in Runcorn, and finished on 26 March 2008 in Barrow in Furness.

He toured with the production Popstar: The Musical, playing the part of Cal between April and July 2010, at a series of theatres across the UK.

Costa took part in a celebrity version of TV show Total Wipeout which aired on 18 September 2010.

Blue released their fourth studio album, Roulette, on 25 January 2013 with "Hurt Lovers" as the lead single.

In April 2016, Costa joined the cast of the musical Save The Last Dance For Me, playing the part of Milton, touring the UK until October 2016.

When interviewed on This Morning the group confirmed that they were back in the studio recording, and that a new album was expected to follow along with the tour.

On 20 May the group unveiled the track listing for the album on their social media accounts, following with the first single, "Haven't Found You Yet".