Chappell Roan is turning 27 today and, to celebrate her bday, we've compiled some of her most outlandish pics.

Chappell is truly out of this world as you can see ... with her sexy green look that can set any anyone's heart aflutter.

Of course, Chappell also appeals to any human whose kink is cosmic.

But, Chappell isn't just a magnificent outta-this-world singer ... she also brings it down to Earth with some lingerie shots that will almost certainly have tongues wagging.

There's also a shot of her in a green bra and patterned slacks that will steam up a mirror.

She's definitely hot to go! Happy Birthday Chappell!!!