Ariana Grande's Ex Ricky Alvarez Attends 'Eternal Sunshine' Tour After Ethan Slater Split

Ariana Grande wrote some songs about Ricky ... and now he's at her show! That's right -- the pop star's ex Ricky Alvarez attended her "Eternal Sunshine" tour Friday night in Austin, Texas ... after we told you they still hang out as friends. Check…

By TMZ Staff