Shania Twain has not often been one to hold back, be it with her looks, performances, or words, but it appears that a dinner with Oprah Winfrey taught her otherwise.MORE: Shania Twain loves this facial oil so much she gifted it to all her friendsOprah has made a name for herself for being a stellar interviewer and for conducting thought-provoking conversations, but Shania has revealed when it came to their own time together, the conversation quickly turned "sour."Speaking on a podcast titled Table Manners, hosted by Jessie Ware where guests discuss "food, family and the beautiful art of having a chat" on her dining table, the singer admitted how she learned to keep some topics off the dining table.WATCH: Shania Twain looked incredible in rare tribute from husbandMORE: Shania Twain recreates iconic leopard print look in high-cut bodysuit and heels"I think one of my most memorable dinners was with Oprah Winfrey," she first said, praising her by maintaining: "She's such a smart lady."However, with great intelligence comes strong opinions, and the songstress revealed that when it came to religion, the two couldn't find common ground."She is quite religious," she explained of the media mogul, meanwhile she said of herself that she doesn't belong to a particular religious denomination.A post shared by Table Manners Podcast (@tablemannerspodcast)A glimpse of the conversationShe said: "I'm not religious in the sense that I'm dedicated to a religion.