Katharine McPhee Mourns the Loss of Her Father, Two Weeks After Her Engagement

The "American Idol" runner up, who two weeks ago got engaged to David Foster, took to Instagram Tuesday to share an emotional message regarding the death of her father Daniel McPhee.

"I can't believe I'm even writing this....But it is with heavy heart that I share that my sweet sweet Papa left this earth yesterday morning. We as a family are completely heartbroken and devastated," she wrote.

"He was my biggest fan, my biggest champion, always telling me to 'Give em hell kid!' He was so kind and caring and made sure we knew how much he loved us. Not sure my heart will ever be the same," McPhee continued.

The 34-year old recently landed the starring role in the Broadway musical, "Waitress," and was sad her father would miss her debut. However, she expressed the hope "he can watch it in peace and from up above."

"Thank you to all my friends who've been so loving and supportive these last 48 hours," she concluded. "I love you Papa. I already miss you so much. This hurts. 💔"

Before her father passed the former "Smash" star informed her fans on Twitter that she had a family emergency and would not be in attendance for her shows over the weekend.

The heartbreaking news came two weeks after her engagement to 68- year-old music producer David Foster.