Sir Elton John fears his longtime friend Lady Gaga has fallen out with him because she been refusing to take his calls. The Rocket Man star became close to the pop star in the early days of her career, and he even made her godmother to his two young sons. However, he has now revealed they haven't spoken in a long time, and he fears the Poker Face hitmaker may be in trouble. He tells TheAustralian.com.au, "With Gaga - who I love, she's the godmother to our children - I'd like to be able to talk to her right now, but I can't get through to her." And it seems outspoken Elton has a few words of wisdom to impart: "There are times when you have to listen. When your persona begins to take over your music and becomes more important, you enter a dangerous place. Once you have people around you who don't question you, you're in a dangerous place."