From Justice League America (International) #67. The following scans start off with Booster shirtless and ends with the both boys tied up wearing only thier undies! Context? Fine. Booster is in Ted's lab where the latter puts a tracking device on Booster's shirt (hence his shirtlessness.)
Ted's all paranoid and Booster tells him off for not being as fun as he used to be.
So to prove that Ted's still the fun-loving guy we all know and love, the best buds decide to play a prank on the members of their sister team, the Justice League Europe. They plan to teleport to the JLE's headquarters and pretend that the trasporter has spiced them.