ITZY performed "Be In Love", and Netizens are highly praising the rookie girl group members in the comment section. You can watch ITZY's performance, and read netizens reactions below.

"First of all i didn’t know they could sing like this. itzy is a group that can really do it all. i’m glad i was here since debut."
"This video shows their Rapping and Vocal skills. The past comebacks showed their Dancing skills. For everyone whose been saying they have no talent, this just proves how much talent they have. Go ITZY!"
"Why is everyone slaying?!?! Chaeryeong's high note - was not expecting this and can we have this for HER comeback + rapping + center dance break. We had a sample of Ryujin's higher notes - she normally sticks to low and I love it. Yeji is always stable and her voice stands out.
Yuna... I just want her to sing MORE - she's really proven she's up there with Lia in terms of vocal capabilities. Finally..... the best vocal queen for last to mention - LIA - THIS IS HER ERA and she deserves all the vocal praise for working so hard; this was exactly what I expected from her and honestly even more after listening to the entire album."
"Finally a song that suits Lia's vocal range! Now she has showcased herself being the main vocalist."
"Lia isn't called main vocalist for nothing, her vocals here are no joke and she really slayed this cb. Chaeryeong's confidence and falsetto. Ryujin's deep voice and note she sings here and did also falsetto. Yuna improved so much with her vocals and has more lines now. Yeji's high note. All in all, they all slayed this era."
"All the members are all-rounders. They can sing well, dance well, they can rap and they're all f*cking beautiful. STAN ITZY!"
"Something is so calm and beautiful about this whole song and the way they are singing happily sitting there."
"not sure if the girls who's singing are ITZY, I think they're angels 'cause their voices are heavenly"
"this era really proves their pure vocals, its soo calming."