'Hai Jawani Toh Ishq Hona Hai' is a lighthearted entertainer that sticks to the familiar David Dhawan playbook and delivers exactly what it promises. #HaiJawaniTohIshqHonaHai, #JimmyShergill, #KubraSait, #ManieshPaul, #MouniRoy, #MrunalThakur, #PoojaHegde, #VarunDhawan