If rumours are to be believed, music power couple Gwen Stefani and Blake Shelton have been planning a wedding since a long time. Considering all the marriage rumours that have been doing the rounds, the songstress's recent 'tongue-tied' answer on the marriage prospect further reinforced the speculations surrounding the duo.

The Hollaback Girl singer appeared on a radio show with Ryan Seacrest on Friday (9 September) when she was prod about her marriage plans with boyfriend Shelton. Clearly the 46-year-old songstress was not expecting the sudden blow as she appeared all flustered answering the question that the pair's fans have been asking for long.

"I don't know! God, I don't know. Everything is going so quickly," the mother-of-three told the show host on the prospect of her re-marriage. She couldn't hide her awkwardness when she further answered, "I'm in the moment and um — Look at me! You got me tongue-tied."

"If there is a wedding date, they haven't told their families yet," an insider told Us Weekly about the couple's eventual nuptials. "They talk about their future and growing old together, but there aren't specific plans like a dress or flowers."

However, there has been a speculation that the singer couple might exchange their vows during the upcoming holidays in an intimate ceremony. "It would likely be at Blake's ranch [in Oklahoma] or in the backyard. Gwen doesn't really care, she is just in love with Blake and their life together," the source added sharing details about the coveted ceremony.

If and when the nuptials take place, it would be the second time that Stefani walks down the aisle after splitting from ex-husband Gavin Rossdale last year. Even for Shelton it would be a re-marriage as he was previously married to Miranda Lambert and Kaynette Williams.