From the show I'm watching now, with Jodi, 好想好想谈恋爱 ("I Really Really Wanna Be In Love"):

当灯泡谁要付电费的

If I'm going to be the lightbulb, who's going to pay the electric bill?

In Chinese, being the lightbulb (灯泡) is the equivalent of being the proverbial third-wheel.