Demi Lovato is notoriously the comeback queen. Despite all of the setbacks she has faced, she is back yet again and is ready to take the world on by storm. Lovato went to rehab after a near-death overdose she experienced in July 2018. Since then, Lovato has worked hard to get her career back on track. She will be playing a guest role in 'Will & Grace' as well as singing the National Anthem at the Super Bowl and performing at the Grammys.