Miranda Lambert's week is off to a great start! Not only is it her first week as Blake Shelton's wife, but she is sitting pretty at No. 1 on the country singles chart with her latest hit, 'Heart Like Mine.'

The tune is the fifth release from her 'Revolution' album, which spawned previous chart-toppers 'White Liar,' 'Only Prettier' and 'The House That Built Me.'

'Heart Like Mine' was co-written by Lambert, along with her Pistol Annies' partner Ashley Monroe and Travis Howard, who is also the co-writer of the singer's 'Famous in a Small Town.'

With 'Heart Like Mine' reaching the top of the charts, Monroe is experiencing her second No. 1 as a songwriter. In February of last year, Monroe and songwriter Brett James spent time at No. 1 when Jason Aldean took their song 'The Truth' to the top.

"All three of us [were] excited about the possibility that it could keep climbing," Monroe tells Taste of Country. "[It's a great feeling] to have another No. 1 single!"

'Heart Like Mine' was the final single from Lambert's 'Revolution' album. Her next single will be the first from her fifth studio album, which she's reportedly set to work on this month.