Friday was a big day for Fifth Harmony's summer tour opening act Bea Miller!

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The girl group's fellow X Factor alumna dropped her debut album, Not an Apology.

Miller is super thrilled about finally letting her complete album be out. She even dished on Twitter a "fun fact" about it.

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She "hand wrote all the lyrics for every song," which were then "photocopied to be the lyric sheets" within the physical copies bought.

So basically this album is really personal to her since she put so much effort into its packaging. Anyway, Miller performed Friday night at Fifth Harmony's tour stop in Arkansas at the Walmart AMP and during her performance the 5H ladies surprised her with "A CAKE" to celebrate her album releasing.

"IT WAS SO CUTE," Miller said of the thoughtful act done by the girl group and about the cake itself.

Earlier in the evening 5H's Camila Cabello declared she's Miller's "#1 FAN" on Twitter.

She also dished that she texted her tourmate the night prior about had she not auditioned for X Factor, she'd "be at home running a Bea [M]iller fan account."

"[M]aybe [I] have one," Cabello then joked.

The friendship between these X Factor friends is so adorable, right?