Hooray for Hollywood! The 2015 Oscars have come and gone, but our heads are still spinning from all the craziness. From the star-studded red carpet pre-show to the final sign-off from host Neil Patrick Harris, every minute of the 87th Academy Awards on Feb. 22 was a conversation starter. (Just look at Twitter!)

PHOTOS: What the stars wore to the 2015 Oscars

In case you need a cheat sheet, here are just a few of the many highlights and top moments from Hollywood's biggest night.

1. Neil Patrick Harris Flubs Chiwetel Ejiofor, David Oyelowo, Margot Robbie's Names

Practice doesn't always make perfect! Neil Patrick Harris stumbled over several names during the telecast, some on purpose, some not. To be fair, though, he had his hands full with that opening song-and-dance number and he was mostly naked when he mispronounced Margot Robbie's name as Margot Row-bie. (Who wouldn't be flustered?)

2. Lady Gaga Hits All the Right Notes in Impeccable Sound of Music Tribute

After giving a sweet shout-out to fiance Taylor Kinney earlier in the night, newly engaged Gaga took the stage at L.A.'s Dolby Theatre to sing a medley of songs from The Sound of Music, including "Edelweiss" and "My Favorite Things." Even Julie Andrews who played Maria in the 1965 movie musical was impressed with her performance!

PHOTOS: Best dressed stars at the Oscars

Lady Gaga performs onstage during the 87th Annual Academy Awards Credit: Kevin Winter/Getty Images

3. Patricia Arquette Calls for Equal Rights for Women, Meryl Streep Goes Wild

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Oscars 2015 Highlights and Top Moments: Your Cheat Sheet for Hollywood's Biggest Night