A "Rose without a Thorn," daughter of Lord Edmund Howard and first cousin (once removed?) of Anne Boleyn, Catherine Howard married Henry Tudor on July 28th, 1540 at the age of 19 (Henry was 49) becoming his 5th wife. She rekindled his enthusiasm for life after much torment from losing Jane Seymour and divorcing Anne of Cleeves (to whom she served as lady-in-waiting). She enjoyed dancing and other such courtly indulgences.
But having a reputation before her marriage in terms of numerous lovers (including music teacher Henry Mannox) and a vivacious nature that called her fidelity into question, she was accused in November 1541 of treason/adultery. Her accomplices, Thomas Culpeper (a distant cousin) and Francis Dereham, were executed in December of that year while she was placed in the Tower and finally beheaded on the 13th of February, 1542. Happy Valentine's Day, Henry.