As shown in the video above, when performing Oh Yeah with a female other than Park Bom, Jiyong would skip the part "come be my lady~".
During 2010 MBC Gayo Daejeon when GD&TOP and 2NE1 performed Oh Yeah together, we are not sure whether Jiyong did or did not skip "come be my lady~", maybe the background music was too loud.
One thing's for sure, he did not give CL the same amount of attention he'd give to Park Bom.
He later gave his full attention to the lovely lady when she appeared near the end which has been pointed out before. ^__^

video credits: yk26395@youku
via yk26395@G-BOM Baidu Bar