Simple bride Carrie Underwood

Jan 7, 2010, 16:41 GMT

Carrie Underwood wants a simple wedding.

The 'Cowboy Casanova' singer - who had previously kept her year-long relationship with Ottawa Senators hockey player Mike Fisher largely under wraps - announced her engagement just before Christmas and is already planning ahead for the big day.

She said: "I want a groom, good food and an open bar."

Despite not yet deciding who will be designing her wedding dress, the country singer said she'd already thought about how she planned to look on the big day.

She added to US TV show 'Access Hollywood': "I'm Southern. I like big hair and eyeliner. I want my wedding day to be me, so I'll probably be rocking some big hair and some eyeliner."

Meanwhile, the 26-year-old star - who admitted she kept her relationship with Mike, 29, alive by constantly texting and running up huge phone bills - is also set to make her acting debut with a guest spot on 'How I Met Your Mother'.

She will star as pharmaceutical rep Tiffany, a love interest for Ted, played by Josh Radnor, in an episode set to air this March.

Carrie isn't the first star to play a character with romantic feelings for Ted, as Britney Spears played Abby, a bubbly secretary who had a crush on him in 2008.