Joe Jonas heads out to dinner at Katsuya with baby brother Nick over the weekend in Hollywood.

Just a few hours before, the 23-year-old musician was in the hospital for abdominal pain.

TMZ reports that Joe was in “the emergency room at Children’s Hospital L.A. on Sunday. We’re told Joe was only at the hospital briefly … and it’s not clear what was wrong with him.”

Earlier over the weekend, Nick, 19, was spotted picking up a cup of joe after shopping at Henri Bendel. We wonder what he got?

For more Nick pics, head on over to X17online!