Stars at the inauguration. Lady Gaga, Garth Brooks and the moments you didn’t see. Plus, Jill Biden, Michelle Obama. Our ET style guide to first lady fashions! Then, ET is flashing back to our most memorable Inauguration moments. Plus, Tom Hanks, Justin Timberlake, Demi Lovato! Everything we know about tonight’s “Celebrating America” special. Inside the new plan for “Saturday night Live.” will Alec Baldwin and Maya Rudolph return? Then, Walter Goggins and Natalie Zea are dropping new “The Unicorn” details. Casey Affleck gives up brother Ben’s Hollywood secrets. Plus, Exclusive! Ben Hansen uncovers the truth about UFO sightings across America. Then, Scott Wolf takes you behind the scenes and gets you ready for tonight’s season premiere of “Nancy Drew.”