Here are ten songs that have earned significant royalties over the years, along with estimates of their earnings:

"Happy Birthday to You" - Estimated over $50 million (before entering public domain).

"White Christmas" by Irving Berlin - Estimated over $50 million.

"Yesterday" by The Beatles - Estimated around $30 million.

"The Christmas Song" (Chestnuts Roasting on an Open Fire) by Mel Tormé and Bob Wells - Estimated over $30 million.

"You've Lost That Lovin' Feelin" by The Righteous Brothers - Estimated around $28 million.

"I Will Always Love You" by Dolly Parton - Estimated over $20 million (including Whitney Houston's version).

"Stairway to Heaven" by Led Zeppelin - Estimated around $20 million.

"Let It Be" by The Beatles - Estimated over $20 million.

"Smooth" by Santana featuring Rob Thomas - Estimated around $18 million.

"Dancing Queen" by ABBA - Estimated around $18 million.