In June 2014, Burke replaced Beverley Knight in the lead role of Rachel Marron in the West End musical The Bodyguard, at the Adelphi Theatre,[5] touring with the production in 2015, 2016, 2018 and 2019.

In weeks 6 and 7, Burke received positive comments from the judging panel for her performances of "You are so Beautiful" and Dan Hartman's "Relight My Fire" (the popularity of which in the UK is mostly a result of Take That's 1993 revival thereof).

The quarter-final saw her replace Diana Vickers as the bookies' favourite after performing Britney Spears' "Toxic" and Beyoncé' "Listen", for which she received another standing ovation.

[citation needed] After the elimination of Quigg, Burke sang what was to become her debut single, a cover of a 1984 song by Leonard Cohen, Hallelujah, for the first time.

[36] She worked with RedOne for a lot of the album, but also reunited with Bruno Mars, StarGate, Rico Love, Autumn Rowe and Ne-Yo, among others.

Since April 2011, Burke has supported T4's Battlefront show, helping young campaigners Hope and Abby raise awareness about the organ donor register for their Sign Up, Speak Up, Save Lives project.

[citation needed] Burke's lead single from the album titled "Elephant", which is produced by Erick Morillo,[43] was released on 11 March 2012.

On 3 November, she performed "All The Lights" at MAMA Awards with Zico, leader of the k-pop group Block B, as part of a special stage from H-Artistry in Malaysia .

[58] On 25 March 2013, it was announced that Burke would perform a concert version of Lady Sings the Blues at the Royal Albert Hall between 4 and 8 June in the venue's Elgar Room but the shows were postponed.

[60] In May 2013, it was reported that Burke signed a deal with a US management company after impressing former Def Jam president Kevin Liles during a meeting with him in New York.

On 20 November, Burke revealed that the lead single from her upcoming third record had been decided and a video was to be shot in the coming weeks.

[66] Based on the 1992 movie of the same name and made famous by Whitney Houston, Burke played Rachel Marron – a superstar receiving threats from a lovestruck obsessed fan, who falls in love with the new bodyguard hired to protect her.

[67] Burke was approached to play the role two years prior to her 2014 debut, but due to scheduling commitments was forced to turn down the opportunity.

Although The Bodyguard was one of London's most successful and popular shows at the time, it was forced to close as it had reached the end of its contract with the theatre, which had already booked a new production to take residency.

[71] Shortly after the production closed it was announced, in October 2014, that Burke would reprise her role as Rachel Marron in the nationwide tour, kicking off her year-and-a-half residency in the show on 12 February 2015 at the Southampton Mayflower Theatre.

[71] Burke was a contracted cast member of The Bodyguard until the end of June 2016, with her final UK performance in the production taking place at the Congress Theatre in Eastbourne.

[74] It was announced on 8 January 2016 that Burke would be taking over the lead role of Deloris Van Cartier in an all-new UK touring production of Sister Act: The Musical.

Burke commenced a year long residency in the show, making her debut on 30 July 2016 at the Curve Theatre Leicester.

[79][80] Burke then announced her first full UK and Ireland tour in seven years; encompassing 13 venues, would commence in Southend on 1 September 2018, but this was cancelled in June.

In February 2018, it was formally announced that Burke would be returning to musical theatre, starring in the first West End revival production of Chess since 1986.

[81] In July 2018, it was announced Burke would guest star as Roxie Hart in the London West End production of Chicago for an eight-week run.

In late-April 2022, it was revealed Burke would be playing the role of Mrs Blunderbore in the latest London Palladium pantomime, Jack and the Beanstalk, from 10 December 2022 to 15 January 2023.

"[90] During her first studio album, the genre ranged from heavy R&B songs to dance-pop tracks, after she collaborated with dance production team RedOne, as well as working with Stargate and Ne-Yo.

[citation needed] Burke's known influences in music include American entertainers Beyoncé, Michael Jackson, Mariah Carey, Aretha Franklin, Kelly Rowland, and Whitney Houston.

[95] Burke has also listed American singer-songwriters Alicia Keys, John Legend and Mary J. Blige as inspirations in music.

She went on to audition for the second series of The X Factor in 2005, where she made it to judges houses before her mentor Louis Walsh decided she was too young to continue in the competition.

[citation needed] On 30 October 2008 it was announced that British Chancellor of the Exchequer Alistair Darling would waive all tax on copies sold on the single.

British Prime Minister Gordon Brown asked Simon Cowell to arrange a charity single as a way of raising money for the earthquake relief effort.

[134] In October 2013, Alexandra Burke recorded a cover of Cyndi Lauper's "Girls Just Want to Have Fun" for The Happy Egg Company in the United Kingdom.

[139][140] In July 2019, three weeks after separating from her fiancé, Burke was photographed with new boyfriend Rotherham United defender Angus Macdonald during their date at the Wimbledon Tennis Championships.