Have you heard of Frank Sinatra the american singer?
Yes, of course.  I can't recall the names of his most famous songs though.
Sinatra was one of the most popular artists as well as influential of the 20th century
Wow, he acting too, I think and was part of a group of other entertainers.
Yes in Vegas he became known as a member of the Rat Pack
Do you know the names of the other members?
Actor. Sinatra released several critically lauded albums, including "In the Wee Small Hours" (1955), "Songs for Swingin' Lovers!" (1956), "Come Fly with Me" (1958), "Only the Lonely" (1958) and "Nice 'n' Easy" (1960).
Sinatra left Capitol in 1960 to start his own record label, Reprise Records, and released a string of successful albums. In 1965, he recorded the retrospective "September of My Years"
Frank Sinatra filmography
Frank Sinatra (1915–1998) was an American singer, actor, and producer who was one of the most popular and influential musical artists of the 20th century. Over the course of his acting career he created a body of work that one biographer described as being "as varied, impressive and rewarding as that of any other Hollywood star".
Sinatra began his career as a singer, initially in his native Hoboken, New Jersey, but increasing success led to a contract to perform on stage and radio