Ariana Grande, $100,000
First meeting on SNL, the “Thank U, Next” singer and comedian Pete Davidson sparked media frenzy when they were spotted getting cozy in May during the Billboard Music Awards and getting matching tattoos of clouds on their fingers. After only a month of dating, engagement rumors began to swirl before being confirmed in June. The pear-shaped diamond, worth almost $100,000, was later swapped out for a “friendship ring” after the couple called off their engagement in October.