Robin, Kid Flash, Aqualad, Speedy, Mas, Menos, Cyborg, Beast-Boy and Super-boy (Not from the Titans, but was captured nonetheless by Joker as bait for Superman) were trapped in a containment field waiting for their respective mentors and Justice League to rescue them from the maniacal clutches of The Joker.
In another containment field near them, were the females of Titans East and Titans West. Raven, Starfire and Bumblebee.
Kid Flash, always the joker (no pun intended) decided to sing songs while they waited.
First he sang '10 green bottles', and then he sang 'If you're happy and you know it clap your hands' and finally, to his teammates' dismay, 'The never ending song'.
"Can't you sing something else!?" Robin yelled in annoyance.
"Ummm, sure I guess," Kid Flash shrugged his shoulders, "any request?"
"Wait, okay I've got one! Let me see….okay." Kid Flash hummed a familiar tune then started singing. "Who said, who said I can't be Super Flash, I say, I say that'll be a dash."
Speedy started to get the game, "Hey, my turn now!" He cleared his throat and sang "Who said, who said I can't be like Green Arrow? I said, I said, with my Bow and Arrows!"
The other Titans without mentors began laughing, Super-Boy go into the act next. "Who said, who said I can't be Superman? I say, I say, I think I'm already am!"
"Who said, who said I can't be Aquaman? I say, I say I know I can!" Aqualad choked out laughing.
Meanwhile, the Justice League had apprehended The Joker and was listening in amused at their children's antics. Even the usually somber Batman was smiling a bit.
In the containment field, the Titans (and Super-Boy) in it were looking expectantly at Robin.
"What?" Robin said, "oh, no way, no way!"
Everyone (expect Robin) looked at him with the best puppy-dog face they could do.
"Fine, fine." Robin rolled his masked eyes and started singing. "Who said, who said I can't be Batman..."
At that point, Batman walked into the room. With a twinkle of his eye he did what his friends thought he'd never do, he sang "No way, no way, because I am!"