Global superstar Taylor Swift turned 35 years old on Friday, Dec. 13, and continues to be one of the most in-demand musicians as witnessed by a recent auction for old family Christmas cards and her recent success with a tour photo book.

What Happened: Swift is likely celebrating the end of her record-breaking "Eras Tour" along with her birthday on Friday, but some investors or fans will soon be celebrating their recent purchase.

Auction company Goldin, which is owned by eBay Inc (NASDAQ:EBAY) recently sold two holiday photo cards featuring a young Swift on them, including two Christmas cards...