Recently reunited pop-punk outfit Fall Out Boy are making their Top 20 debut this week, as are dance-y electro trio Krewella. FOB are at the very tip-top of the chart with 'My Songs Know What You Did in the Dark' at No. 20, and (mainstream) newcomers Krewella are right behind at No. 19 with 'Alive.'

Further down the charts, we've got a double batch of Bruno Mars, some suave sounds from Justin Timberlake, a will.i.am and Britney Spears club banger, as well as Taylor Swift's latest breakup hit 'I Knew You Were Trouble.' Check out the full list of Top 20 Songs for the week of March 11-17, 2013, below.

Top 20 Songs: Week of March 11 - 17, 2013

20. Fall Out Boy, 'My Songs Know What You Did in the Dark'
19. Krewella, 'Alive'
18. One Direction, 'Kiss You'
17. Mumford & Sons, 'I Will Wait'
16. Olly Murs, 'Troublemaker'
15. Justin Bieber, 'Beauty and a Beat' Feat. Nicki Minaj
14. Pitbull, 'Feel This Moment' Feat. Christina Aguilera
13. Kelly Clarkson, 'Catch My Breath'
12. Kesha, 'C'Mon'
11. Rihanna, 'Stay' Feat. Mikky Ekko
10. The Lumineers, 'Hey Ho'
9. Imagine Dragons, 'It's Time'
8. Bruno Mars, 'Locked Out of Heaven'
7. Justin Timberlake, 'Suit & Tie' Feat. Jay-Z
6. Bruno Mars, 'When I Was Your Man'
5. Calvin Harris, 'Sweet Nothing' Feat. Florence Welch
4. Maroon 5, 'Daylight'
3. will.i.am, 'Scream & Shout' Feat. Britney Spears
2. Taylor Swift, 'I Knew You Were Trouble'
1. Swedish House Mafia, 'Don't You Worry Child'

Note: Every Monday, PopCrush will publish a list of our Top 20 songs for that given week. Then, over the weekend, fans can tune in to our national radio show to hear all of these hot songs plus some other amazing pop tunes. To see a list of radio stations where you can hear the PopCrush Top 20 countdown, click here.