Lea Michele and Cory Monteith
Michele and Monteith began dating in early 2012 after meeting on the FOX comedy Glee. That December, the Canadian actor confirmed the relationship during an appearance on The Ellen DeGeneres Show. One year later, Monteith tragically died of a drug overdose in July 2013 at the age of 31 while the two were still together. "Thank you all for helping me through this time with your enormous love & support," Michele tweeted at the time. "Cory will forever be in my heart." In February 2014, the actress released a tribute song for Monteith titled "You're Mine" off her debut album Louder.