Katy Perry has two very personal projects being released this summer — the 12-track album “Smile” and a baby. Only one will really make people grin.

“Smile” comes three years after the dismal release of “Witness,” a criminally underappreciated album that’s considered a commercial dud.

That album contained the sociopolitical “Chained to the Rhythm” and the music flirted with a more hip-hop sound. It’s underperformance — and some heartbreak, we assume — led to a period that Perry describes in the liner notes as “my own darkest times.”

So “Smile” is a course-correction back to pure pop, with no featured artists and no political messages. It is Perry’s “I’m so sorry” album, littered with references to a chastened songwriter — “ego check,” “humble pie,” “better version” and “2.0.” Like the cover image, she’s a sad clown.

To be honest, there are only rare moments of levity. Perry is pregnant with her first child with actor Orlando Bloom and one of the best lines on the album is, “Look at me now/I’m in full bloom.”

But most of the set is a bit of a bummer. Just the titles alone — “Never Really Over,” “Cry About It Later” and “Teary Eyes” — are about mistakes, regret and lessons learned. This isn’t an album of pop songs as much as a therapy session set to music.