Listen to Be Careful, It's My Heart (From Holdiay Inn In the Style of Bing Crosby) [Backing Track Version] online. Be Careful, It's My Heart (From Holdiay Inn In the Style of Bing Crosby) [Backing Track Version] is an English language song and is sung by Soundmachine. Be Careful, It's My Heart (From Holdiay Inn In the Style of Bing Crosby) [Backing Track Version], from the album Ultimate Backing Tracks: Movies, was released in the year 2011. The duration of the song is 3:29. Download English songs online from JioSaavn.