Selena Gomez is back to her old self, heading to her place of peace -- Hillsong Church -- on Easter Sunday.

The singer wore her hair parted, with her bangs in curls framing her face; a loose sweater (did she forget her bra?), jeans and $1000 Gucci kitten-heel mules.

Gomez was with a pal as she attended the service and hugged a male friend as she entered. Perhaps she knew her ex Justin Bieber and his wife Hailey Baldwin wouldn't be there -- that he'd be taking the stage with Ariana Grande at Coachella during weekend two.

So back to Selena's attire ... kinda funny -- she wore Levi's and guess who was just named the first face of the legacy denim brand ... Hailey, of course! Hmm ...