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In page Mary Byrne (singer):

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Byrne suffered from arthritis in her knees which proved difficult for her during the initial stages of The X Factor, but has led to comical improvisations during her tour with Grease.[1] Before The X Factor, she worked for supermarket chain Tesco, leading to her referral as "Tesco Mary".[citation needed] She quit singing at 28 because of low self-esteem after a failed relationship. After her appearance on The X Factor she admitted on RTÉ's The Late Late Show that she had suffered from clinical depression for a number of years.[2][3] She performed with her brother, Tommy, under the name The Tommy Lee Experience.[4] In 2008 she won the Irish television singing contest Nollaig No. 1 using the name Mary Lee and released the single "Siúil Leat".[5]