This is a simple song, gonna write it for a friend My shirt is inside out, I'm messy with the pen He met Margaret on a rooftop, she was wearing white And he was like: I might be in trouble He had flashes of the good life, he was like Shall I jump off this building now or do it on the double? 'Cause, baby, if your love is in trouble Baby, if your love is in trouble Baby, if your love is in trouble When you know, you know When you know, you know It kinda makes me laugh Running down that path When you're good, it's gold 'Cause when you know, you know A word to all my friends With their red fires, their white ice Their black eyes and their blue lies If you're asking yourself: How do you know? Then that's your answer, the answer is no You gotta run, gotta run, run, run, run like your head's on fire Run away like your head is on fire 'Cause, baby, if your love is in trouble Baby, if your love is in trouble Baby, if your love is in trouble When you know, you know When you know, you know It kinda makes me laugh Running down that path When you're good as gold 'Cause when you know, you know When you're old, you're old Like Hollywood and me The diamond on your ring The soul that you bring to the table The one that makes me sing, 'ing in a minor key 'Cause when you know, you know When you know, you know So if you don't know Don't give up 'Cause you never know what the new day might bring Maybe tomorrow you'll know Maybe tomorrow you'll know Maybe tomorrow you'll know I mean, join the party By the way, the party is December 18 (hey, let's waltz this out, 'cause) 'Cause when you know, you know When you're old, you're old Like Hollywood and me That diamond on your ring The soul that you bring to the table The one that makes me sing, 'ing in a minor key Diamond on your ring 'Cause when you know, you know When you know, you know