Many of music's biggest stars were inspired by Amy Winehouse's music, so it's no surprise that dozens of them took to Twitter to share their grief when she died suddenly on July 24. While some, like Cee Lo, tweeted to their followers asking whether the news was true, game-changer Lady Gaga expressed just how deep her love for the 'Rehab' singer runs. Both Ne-Yo and Mary J. Blige sent kind words to Winehouse directly, and Maroon 5 Adam Levine just couldn't seem to shake the disbelief that she's truly gone. See your favorite pop stars' tweets about Amy Winehouse's death.