The sentence 'I am overwhelmed with happiness' is correct and usable in written English. You can use it any time you want to express being extremely happy, for example: "I'm so grateful that my parents were able to come to my graduation ceremony - I am overwhelmed with happiness.".
But this time I was overwhelmed with happiness.
I was overwhelmed with happiness.
Tiga's original "Planet E" is overwhelmed with happiness, as odes to ecstasy often are.
"I'm overwhelmed with thoughts of Jesus," Mr. Bishop wrote on Oct. 13, on his blog, Bishop in the Grove.
"I am overwhelmed, extremely happy and excited," McKennis said.
"I am very happy, I am overwhelmed," said Mason.
"I am overwhelmed," said Burke.
I love the desktop app, it’s always running on my Mac. Ludwig is the best English buddy, it answers my 100 queries per day and stays cool.
Cristina Valenza
Retail Lead Linguist @ Apple Inc.