"Two Girls on Broadway" is a remake of "Broadway Melody". Considering that "Broadway Melody" was such an early musical (with rather primitive sound) it's not surprising that the studio would remake the film.
The film begins with a young singer/songwriter (George Murphy) getting discovered. However, Eddie's a regular guy and he's sure to not only take this great job but make sure there's a job for his old sweetie, Molly (Joan Blondell), and her kid-sister, Pat (Lana Turner). Unfortunately, when Molly and Pat try out for the show, the producers like Pat but have no use for Molly. Molly, however, insists that Pat take the job and they give Molly a job as a cigarette girl. Now Pat and Eddie are poised for stardom...but what about nice-girl Molly? And what about Pat? The lecherous producer might just have his eyes on her...as does Eddie!
So is the film any good? Well, it's pleasant and enjoyable--and with a few amazing sets which hark back to the original "Broadway Melody". As for the story, it is a bit old fashioned but the actors did a nice job and managed to make it work. Also, Blondell's character, Molly, is a HUGE improvement over the original film in which 'Hank' is very unlikable--whereas here, Molly is much more likable and you can understand Pat and Eddie's concerns about her--which makes the plot make more sense. Overall, not a great musical by any stretch but enjoyable if you like the genre and a slight improvement over the original.
By the way, I did have to laugh about the subplot in the film where Eddie and Molly are worried that sweet, innocent Pat might get seduced by the playboy producer--a man who's been married several times. Lana Turner (Pat) in real life was married eight times (one of the husbands she married twice), so these concerns seemed a bit silly.