Numb 
Bleed It Out was the first one i remember but i think i heard papercut before that
In the End (it was 2001 in my car and I was rock,lol)
In the end
One of the first songs I remember listening to was Nobody’s Listening. My brother was playing their album and played that song and I really liked it
Numb in 2006
mine was Don’t Stay. i heard the song in the car when my mom bought Meteora.it was a really good song because i was tapping to the rhythm and jumping up and down like i was at a fricking concert!
one step closer
In The End…nearly 10 years ago!
Mine was Crawling. Saw it on the Belgian tv and couldn’t resist to turn up to volume. Also 10 years ago already
OSC at a friends house on mtv after school back in the day '00
One Step Closer on MTV (when they still played musicvids 
) , bought the single and the second song i heard of LP was My December. 
Surprise for you…
Nobody’s listening!
First I’ve heard Numb on MTV, but I didn’t even know it was Linkin Park.
Then, I’ve heard my sister was listening to music in her room. When she left, I went to her room and clicked play(I was 6 years old, and I didn’t have my own radio, so her room was attracting me so much), and because she left while listening to From the inside, the first song I heard was Nobody’s listening. It was my favourite song for some time, then I forgot about it, and I rediscovered LP in January 2010 with Papercut and Leave out all the rest (I got a second hand phone and somebody left the song there; Then I discovered thet it’s the same band I found 7 years ago).
End of story
One Step Closer…
The first song I heard was in 2000. First track on Hybrid Theory, Papercut. Haven’t been able to stop listening to them since. Recent LP Underground member, long term fan
Mine was In The End, I heard it from the radio and I think I was about 12 years old then. I liked the song, and loved Chester’s voice especially in the “I’ve put my trust in you….” -part, but I didn’t become a fan before the year 2007, not even then when I heard Numb and Breaking The Habit couple years later, and loved them. Weird but true.
oh hard to remember, it`s a long time ago.
I know it was the Hybrid theory album and might be Papercut.
The first song I ever heard was Runaway, it was the backing music in an Anime Video and I had to contact the person who made it to find out who the artist was, and the rest as they say is history (^_^)
Mine was One Step Closer. I saw the TV commercial for HT and i was addicted, and after the commercial they showed the video clip of One Step Closer and I was like bam bam bam , they’re so cool , I want that CD
I cannot remember the very first I heard, but it must be one of these: Numb, In The End, One Step Closer, Leave Out All The Rest, What I’ve Done… a old (ex) friend of mine made me listen to them in late 2007…