D'Angelo -- Chow Does It Feel?

D'Angelo is in the middle of his first-ever Australian tour, and from the looks of it ... there's way more of R&B's former #1 sex symbol for fans Down Under to love.

The "Untitled (How Does it Feel)" singer was performing at Soulfest in Melbourne last weekend ... and he's no longer flaunting the buff physique he had years ago. Still sounds good though.

The ex-neo soul brother #1 has had huge swings in poundage over the years.

It's an up year.