This is Sofia Richie. View this photo on Instagram Instagram: @undefined This week, the 21-year-old model — and daughter of Lionel Richie — set Instagram on fire with this topless photo she posted: View this photo on Instagram instagram.com A serve. 👏🏾 "How’s your Thursday?" Sofia captioned the snap, prompting a wave of responses, including one from her boyfriend, Scott Disick. View this photo on Instagram instagram.com "It’s not bad, thanks," Scott wrote. LOL. instagram.com And he wasn't the only one having a better day thanks to Sofia's pic. YouTuber and makeup artist Nikita Dragun said she was doing "a lot better now 🥵" after seeing the photo. instagram.com Meanwhile, model Lori Harvey was simply at a loss for words, writing, "Woahhhhh 😍😍😍." instagram.com "Jesus Christ, Sofia Richie you better 🔥🔥🔥🔥," TINGS Magazine founder Vas J Morgan wrote underneath the pic, which has nearly half a million "likes" now. instagram.com In the words of Lord Disick: Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF E!