david guetta, mibehindo many songs.and so will this. take a quick look, if you will, it's a signed snapchat selfie from sandy, one of the many s r stars of "annie." and now to robin with the rest of the all-star cast. >> i do. we don't have to wait until tomorrow, the sun came out. the cast of annie taking over times square. the classic 1982 movie has been revamped. but don't worry, your favorite songs are all still there. ♪ maybe far away or maybe real near by ♪ ♪ it's a hard knock life >> i said no singing and dancing! ♪ i think i'm gonna like it ♪ easy stream ♪ i don't need anything but you ♪ ♪ i love you tomorrow you're always that day away ♪ >> we are singing and bopping along with you. welcome here, quvenzhane wallis, jaime foxx, cameron diaz. and bobby. thank you, guys. i told you, i don't know if i was hormonal or what. i was watching it, crying, laughing. it's hard to believe it's more than 20 years since the last "annie." and this latest version. i wasn't sure with the modern twists, twitter and all that. but

and david guetta's "tie tame one." how long did it take you to write that?maybe, and half an hour to record the vocals. ♪ >> reporter: that's amazing. what gets you started on a lyric? >> well, i usually choose one solid concept. i see a chandelier. then i'm like, okay, how can i use that? that's a strong title. >> reporter: times her songs pass through more than one artist's hands. take the song "pretty hurt." >> i wrote it on the sofa three years ago for katy perry. i sent it to her. then i sent it to probably rihanna and beyonce's people and beyonce just slid it into home base and threw the money down. it was an awkward situation. ♪ so, rihanna's engineer had a great idea, he was like, why don't you play her "diamonds?" rihanna was like, this is mine. ♪ like diamonds in the sky >> reporter: everybody goes home happy. >> yeah, that's how we like it here at chez sia. >> reporter: why step out and become a artist again? >> i didn't think this music would get hurt otherwise. >> reporter: in 2005, her song "breathe me" was used in the finale of "six feet under