Jayz vs Wale ?

Did Jayz imitate Wale on his "D.O.A." song? or is this the other way around ?

I woke up this morning & as i was getting ready to start my day, i started shouting out some of my favorite part Of Wale's "Chillin" song ft Lady Gaga (You know the part where she's like "Looking at ! Looking at ! Looking at ! ME! (Thats my favorite part by the way, & as i started to hear the rest of that song play out in my head, & i heard that part "Ey ey ey, Goodbye" ... it started to sound awfully familiar to another song, ive been hearing recently, actually, when i thought about it, & that other song, which came to my mind was also using that same particular, popular chant "Ey ey ey, Goodbye" .Can you guess what song that is ? Thats right. Jayz's "D.O.A." of course. Now whose to say who really came out with that hook usage this year 1st, but from what i know, given the fact that i was onto that same song by Wale & Gaga WAAYY LONG before anybody even knew who he was & even before his "Nike Boot" single & thats going back a long time back to last year. Jayz however hasnt been out on the scene for a while, & his song was nowhere around in the underground circuits either when i was 1st beggining to bump the Wale. Now i dont wanna accuse anybody of anything but, id say somethings up. I dont know who would really motive to gain & its not like other mc's havent copied from J in the past b4. In the court of law, if someone came out with something, 1st & then someone else comes out with almost the exact same thing, thats similar, & they both used it consistently through-out the hooks, in the same way, then somebody took from someone, & i would say that because the songs are playing against each other now also around the same exact time, to have that impecable timing of coming up with that same exact idea for that hook, being flowed in almost the same way almost is i dont know. I mean Wale is signed w Jay to his Roc Nation label. Let me know what yah think though. I dont know is it the other way around ? Did Wale emulate from J ? or is it just coincidence ? i dont beleive in coincidences though ? I beleive everything happens for a reason. Whether its good or bad. Which song do u like better ?