From Katy Perry to Charlize Theron to Troye Sivan, countless A-list celebrities joined the Women's March protests in Washington, D.C., Los Angeles, New York City and more.
15 celebrities -- including Alicia Keys, Jennifer Lopez, and Kerry Washington -- came together to each tweet a different line from Dr. MLK's "I Have a Dream" speech.
From Beyonce's rallying cry to K-Pop rookies BLACKPINK's jam to The Weeknd's brief yet brilliant Lana Del Rey collab, these are the best songs of the year.