Two jobs show up in these lines. As a question it asks whether such a thing exists: 가사 뭐 하나 좀 떠오르는 것 있으세요? 'is there anything that comes to mind for the lyrics?'. As 있죠 or 있잖아요 it is not a question at all but a nudge for agreement — 몸이 떨리는 것있죠? 'you know how your body shakes?' — setting up whatever the speaker says next.