Madonna performed hours before her 51st birthday at Bemowo Airport in Warsaw, Poland on Saturday night (August 15), where the audience sang “Happy Birthday” to the Material Girl. “I see a sign over there that says, ‘You changed my life. I want to say, because it’s my birthday and birthdays are always a time to think about everything you have to be grateful for, that every time I do a show, and every time I look into your eyes, and every time I see your smiles, you change my life,” Madonna told the audience. “It’s amazing that I’ve been able to do what I do for so many years. I love my job, and this is the best birthday present ever!” Watch the ‘Happy Birthday’ serenade below.