Today on Twitter, 'Achy Breaky Heart' spawn Trace Cyrus -- brother of the much more famous Miley Cyrus -- dropped a bomb to his followers: He's engaged to Disney star Brenda Song! We still don't know if she's pregnant, but we sure are happy for the couple. Congrats to them! Also in today's tweets, Nicki Minaj just couldn't stop talking about her aww-worthy appearance alongside the adorable 'Super Bass'-singing Sophia Grace Brownlee on 'Ellen,' but we don't blame her since all of the web is raving about it, too. Also, Ne-Yo tweeted about the birth of his first son, Rihanna teased her 'We Found Love' vid and Justin Bieber spat sour words for some pesky paparazzi. See what your favorite stars were tweeting today!