Happy Canada Day in advance! (Fun fact: Canadians celebrate their day of independence on whatever day is convenient because no one knows the real date.) Did you know Nickelback is from Canada? (Thanks Canada!) But so are The New Pornographers, Leonard Cohen, and Neil Young. Of Montreal is from Georgia but they're named after a bad ex of the bandleader who lived in Canada so that counts. Below are the instructions for adding to this week's Friday Mixtape: Oh Canada (it's funny because it's their anthem).

Maybe I just have an inferiority complex about my novelty-music past, but I feel guilty about my love for song covers, particularly cross-genre covers. I even love when one hit song inspires dozens of covers. But instead of mocking the artists who remade "Crazy" or "Umbrella," shouldn't we honor them for reviving the "standards" tradition that enriched decades of jazz? Below are a few of my favorite sources for covers and the username and password for adding to this week's Friday Mixtape, "Cover Me."

Last Friday Gawker readers put together the saddest playlist in the world (which you can still hear here). This weekend, add your happiest songs to the happiest playlist ever. Instructions below.

I assumed until a few days ago that everyone had a playlist full of sad songs for when they felt really low. I mean I only had two mix CDs in college: Favorite new music, and the sad playlist. I've curated that sad playlist (now named "Blue") for six years. It's not that I'm a sad person, but a soundtrack soothes me in a time of sharp emotion, and certain songs will always hit me in the chest. So I've put a couple of songs from my "Blue" playlist on the Gawker Muxtape account. Below are the user name and password so you can upload a song to make the saddest playlist in the world.

For the second Friday mixtape contest, give us the music you headbang to. While making mine, I discovered I am a girly man with no hard rock. But here is my headbanger playlist. Make yours at Muxtape.com. [Image of Metal Steve from Diesel Sweeties]

We all had fun sharing the music we like with Muxtape, the online playlist tool. But today I want to hear mixtapes along a theme: Boy or girl makes awkward come-on tape to an unrequited love who already has a significant other. Extra points if you stick to one genre. Make your own and link to it in the comments. Here's mine: I could be your boyfriend (if only you'd leave that jerk).