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Holding Each Other Close
Simpson wrapped his arms around the star.
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Dancing the Night Away
Of course, the two celebrities listened to some of Idol's songs during the evening.
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Getting Ready
A lot of work went into making these costumes.
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Packing on the PDA
"My Idol," Cyrus captioned the snapshot.
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Coordinating Costumes
It looks like their jackets say it all.
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Taking a Cue From Billy & Perri
The dynamic duo channeled Idol and Lister for this year's look.
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Debuting the Final Look
This pair went all out for Halloween 2019.
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Kissing in the Bathroom
Cyrus couldn't resist giving her main man a smooch while helping him with his costume.
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Gazing Into Each Other's Eyes
It looks like their feelings for one another can't be tamed.
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Sticking Out Their Tongues
What can we say? She's just being Miley.
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Sharing a Laugh
It looks like these two had a great time!
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Having Fun at the "After Party"
The musician held his leading lady close in this sexy snap.