Actress Adah Sharma, who is basking in the success of Telugu suspense drama "Kshanam", has been roped in for an important role in Simbu's upcoming Tamil romantic-drama "Idhu Namma Aalu"."Adah will be seen as Simbu's ex lover. Both of them will shake a leg for a special song called 'Maaman Waiting'. Apparently, it was her song 'Shake it like Shammi' from 'Hasee Toh Phasee' that impressed the makers who eventually signed her for this role," a source from the film's unit told IANS.The track is said to be the title song of the film, which is directed by Pandiraj.According to the source, Adah has already arrived in the city to shoot for her portion.Also starring Nayanthara, Andrea Jeremiah and Soori, the film is gearing up for release in April.The film also marks the debut of composer Kuralarasan, younger brother of Simbu.