Chris Pratt finally pops the question and her answer? ET has the romantic details on his sweet proposal to Katherine Schwarzenegger. Plus, the critics have spoken. Lady Gaga takes center stage at the star-studded "Critics Choice Awards." Then, breaking "Royal Baby" news! Meghan Markle's due date and the new family drama surrounding the pregnant duchess! And, "Celebrity Big Brother's" house guests revealed. ET has all the new season secrets. Plus, why Celine Dion is giving some R-E-S-P-E-C-T to the "Queen of Soul." Entertainment Begins and Ends with ET.