All smiles
Definition 1 of 1
Pro Tip 1/3Positive Mood
Used when someone shows happiness through their expression, especially with a big smile. 
After winning the game, the team was all smiles.
Pro Tip 2/3Great News
People are often 'all smiles' when they receive good news or experience something positive. 
He was all smiles when he heard he'd passed his exams.
Pro Tip 3/3Inflection
The phrase can imply temporary happiness, specific to a moment or occasion. 
She was all smiles during her birthday party.