Miranda Lambert is certainly no stranger to number one hits, but this is the first time she has done so as just the songwriter and not the performer! She co-wrote the song "Thought You Should Know" with Morgan Wallen and Nicolle Galyon, which has now reached the top of the Billboard Country Airplay chart. The song is written as a letter for Morgan Wallen's mother, and it will be included in the album he is releasing on March 3rd.