Overview

• Madonna celebrated her daughter Mercy's 18th birthday during her concert at Madison Square Garden, leading the audience in singing 'Happy Birthday'.
• Mercy was brought on stage and played piano before the sing-along, and was given a cupcake with a candle afterwards.
• Madonna praised Mercy as a 'queen' and expressed her love and admiration for her daughter.
• Mercy, who was adopted from Malawi in 2009, is one of Madonna's six children.
• Madonna also shared a touching tribute to Mercy on Instagram, praising her humility, kindness, and musical abilities.