1. light up with pleasure 喜笑颜开
e.g. His face lit up with pleasure when she came in.
2. be extremely delighted 欢天喜地
e.g. We’re extremely delighted at your success.
3. be wild with joy, be ecstatic, be exuberant 欣喜若狂
e.g. The crowd was wild with joy when he scored the final goal.
e.g. We were ecstatic to be together again.
e.g. The children could not have been any more exuberant at the birthday party.
4. wear a happy expression, look cheerful 面带喜色；面带笑容 education.163.co
e.g. He was wearing a happy expression even though he was really worried.
e.g. You look cheerful today. What’s the good news?