No wedding date has been set for the couple, who have been dating for about a year.
"The couple couldn't be happier," said publicist Jessie Schmidt.
Fisher, 29, recorded his 300th career
point for the Senators in their 4-1 win over the Minnesota Wild on
Saturday. Fisher had an assist on Anton Volchenkov's goal in the first
period.
Asked by The Associated Press last
month what Underwood's family thought of Fisher, the 26-year-old singer
said they were supportive.
"They love me and I would hope my
parents would think we raised a good, smart girl, so she's going to do
the right thing no matter what it is," she said.
Days before the CMA Awards in early November, Underwood did not know whether she would be spending the holidays with Fisher.
"Christmas, I don't know. We haven't really thought that far ahead. We kind of take it one week at a time," she said then.
Underwood has kept her relationship
largely under wraps, but she gave Fisher a very public shout-out in the
liner notes of her current album, "Play On," that was released Nov. 3.
She wrote, "Thank you (No.) 12 (referring to his jersey number.) You
are the most amazing addition to my life! You are such a wonderful
person and have had such an amazing hand in the building of this album
and in the growth of me as a person. I love you so much! You make my
life better in every way!"
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