In London, nominees Leonardo DiCaprio and Tom Hardy promoted their Oscar-nominated film, The Revenant.
Jessica Simpson and Eric Johnson came back LA from NYC after a few appearances, while Chloe Moretz stopped by Jimmy Kimmel Live in Hollywood.
See what else your favorite stars were up to.
1. Hilary Duff Promotes 'Younger' at AOL Build
2. Mariah Carey Shops at Van Cleef & Arpels
3. Reese Witherspoon Films 'Big Little Lies'
4. Tom Hardy: UK Premiere of 'The Revenant'
5. John Krasinski & Cheryl Boone Isaac Announce 88th Annual Oscars Nominations
6. Jessica Simpson and Eric Johnson Land at LAX
Wait! There's more Hilary Duff, Reese Witherspoon & More: Star Sightings 1.14.16! Just click "Next" below:Next
- Hilary Duff, Shailene Woodley, Reese Witherspoon, Chloe Moretz, Mariah Carey, Tom Hardy, Leonardo DiCaprio, John Krasinski, Jessica Simpson, Eric Johnson, Jack Black, Zooey Deschanel, Scott Disick, Kristen Stewart, Erin Andrews
- Giuliana Rancic
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- Hilary Duff Slideshows, Shailene Woodley Slideshows, Reese Witherspoon Slideshows, Chloe Moretz Slideshows, Giuliana Rancic Slideshows, Mariah Carey Slideshows, Tom Hardy Slideshows, Leonardo DiCaprio Slideshows, John Krasinski Slideshows, Jessica Simpson Slideshows, Eric Johnson Slideshows, Jack Black Slideshows, Zooey Deschanel Slideshows, Scott Disick Slideshows, Kristen Stewart Slideshows, Erin Andrews Slideshows
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- Kelly Lynch