I was fortunate enough to see Fleetwood Mac in concert twice before the legendary quintet broke apart and Christine McVie passed away. The first time I saw the band, I thought Lindsey Buckingham was the coolest. The second time, I realized Stevie Nicks is.
Yes, in both shows, the famous pair sang "Silver Springs" while looking directly at each other. They practice looking at each other, the stranger in the seat next to me whispered conspiratorially. But I don't think you would need to practice eye contact while performing in such proximity – sometimes sharing the same microphone – even for musicians like Buckingham and Nicks with their romantic history. Or, especially for musicians like Buckingham and Nicks.
