Born This Way felt like a hit, Judas didn't.
The Edge Of Glory felt like a hit and I'd say had the most longevity (TV still used the video at the end of 2012).
You & I did absolutely nothing, non-existant tbh. They used Marry The Night, but the song flopped despite the airplay it got. Still felt like a hit though! (If I didn't care about iTunes stuff and charts in general and just based my observation on radio and such).
And yep, DWUW was the biggest hit from the ARTPOP era here. The biggest radio station played it a lot. My sister once described it as "that lady gaga song that is always on the radio" when she wanted to know the name of the song so yeah!
I have never heard Applause on the radio( not that I listen to radios very often, but still..).. Also our biggest radio station has a Top10 hits playlist and DWUW was there for a few months.
. RedOne song came out and it was huge on radio, streaming and was everywhere + had a great video
. AHS was huge and had biggest ratings of any series
. Has a huge 1st single next year