ThreeDaysGrace.com The rock world was definitely in shock earlier today (Jan. 9), learning that not only was Adam Gontier  exiting  his post as singer of  Three Days Grace , but that the band had already selected My Darkest Days frontman Matt Walst to replace him on their upcoming tour. The questions began to arise about My Darkest Days’ future as well, given that the band just bade farewell to longtime guitarist Sal Costa earlier this week. Even though the group had stated they were starting work on a new album, the major news about Walst joining his brother Brad’s band obviously followed the earlier new music discussion. With that in mind, Walst has posted a new Facebook message attempting to clear up some of the confusion and discuss his motivations about his work with both bands. It reads as follows: WHAT A CRAZY WEEK It has been a very emotional week for myself and the members of My Darkest Days. With the departure of Sal from the band I have to say that it has felt like I have been on a rollercoaster and I am not sure where the end is. When you are on the road with some one for the length of time that we were, you form a bond just like any other relationship and when one person walks away it is only natural to feel a wide range of things from sadness to anger. That being said please know that Sal chose to leave My Darkest Days and although we are disappointed we wish him the best of luck in his new life and his new endeavors. With every down there is an up! I am very excited to have the opportunity to share the stage with my brother Brad and the rest of the members of Three Days Grace on their Transit of Venus Tour. As most of you are, I was just as shocked as you to find out about Adam’s departure from 3DG. When asked, I was unsure at first as Adam, Brad, Neil and Barry have all been such huge influences on my life musically and personally. After some thought and a few sleepless nights I accepted. It has always been a childhood dream to share the stage with my brother and I get that opportunity on this upcoming tour. Adam is an amazing Singer, Performer and Role-model and all I can do is try and fill some enormous shoes. I wish him well in his recovery and hope to see him grace the stage again soon. With all that has gone on this week I want to assure everyone that My Darkest Days is stronger then ever! My bandmates are very excited for me and I have their full support. We have completed some songs that we are very excited about and my brothers, Brendo, Dougie and lil Reidy will continue to write with me while I am on tour. We are looking forward to putting out our third album and hope you are as excited about it as we are! Last but most important of all I want to thank all of you who have supported My Darkest Days in the past and continue to support us in the future. For those that have been there from the beginning and have stuck by us we thank you with all our hearts. For those who have just joined us we thank you. For those about to rock, we salute you! Matt Walst As previously reported, Three Days Grace have signed on for two legs of a co-headlining tour with Shinedown . The trek launches Feb. 1 in Moline, Ill. and continues through the end of March. Matt Walst will serve as vocalist of Three Days Grace for the entire run. [button href=”http://loudwire.com/shinedown-three-days-grace-add-second-leg-to-2013-co-headlining-u-s-tour/” title=”Next: See Where Three Days Grace Are Touring” align=”center”]