[2] While making her debut at Glyndebourne as Amor in L'incoronazione di Poppea, she was asked to join the Royal Shakespeare Company where she created the role of Cosette in Les Misérables.

[6] Ultimately, she chose Phantom and relocated to Toronto and also spent time in New York in early 1989 for principal cast rehearsals with director Hal Prince.

The Canadian production of The Phantom of the Opera premiered on September 20, 1989, at the restored Pantages Theatre, with Susan Cuthbert playing Christine two performances per week as Caine's alternate.

During her run in Toronto, she joined the Canadian Opera Company to make her North American operatic debut in the title role of Alban Berg's Lulu.

[8] On October 7, 2006, Caine reunited with her former cast colleagues from the original London production of Les Misérables to sing "One Day More" after a performance in celebration of the show's 21st anniversary making it the longest running musical in the world.

[12] In March 2013, Caine played Lady Vale in Darling of the Day at the Union Theatre, London, marking the show's UK premiere after an initial 31-performance run on Broadway over four decades previously in 1968.

[14] In December 2015-February 2016, Caine joined the Asolo Repertory Theatre Company in Sarasota, Florida making her straight acting debut as Raquel De Angellis in Living On Love.

[23] In November 2021, Caine appeared in the 10th Anniversary Concert of Howard Goodall and Stephen Clark's musical Love Story alongside the show's original performers, Michael D Xavier and Emma Williams.

[25] A full staging of the show was mounted in November 2019 at Outburst Queer Arts Festival at the Lyric Theatre in Belfast,[26] where it was filmed and subsequently streamed to worldwide audiences in April 2020.

Ken Bruce introduces Barry Wordsworth conducting the BBC Concert Orchestra at Watford Colosseum, with guest singers soprano Rebecca Caine and baritone Graeme Danby.