(CNN)Gwen Stefani almost ruined it for Blake Shelton.The couple, who are also fellow coaches on "The Voice," recently got engaged and Stefani has shared how she almost messed up his proposal.During an appearance on Kelly Clarkson's daytime talk show (Clarkson is also a coach on "The Voice"), Stefani said she had no idea her longtime boyfriend was planning to pop the question."I was trying to get out of going to Oklahoma because it was getting too complicated with (Covid-19) and the family,"