Bruno Mars and girlfriend Jessica Caban would be celebrating their fourth year anniversary this year, according to Bustle. With them being together for such a long time now, it begs the question of whether the "Uptown Funk" singer will be popping the big question any time soon or not.

Mars began dating the New York-born model in 2011, The Daily Mail reported, and moved in together a year later. They have been keeping their relationship private ever since.

If the "When I Was I Your Man" singer does decide to make things official with his Latina model girlfriend, then he would have no problem looking for a heart-melting track from his expansive discography of love songs.

In fact, according to Bridal Guide, Mars has now become a "wedding staple," with engaged couples opting to play several of the Hawaii-born singer's famous romantic tracks for their special day.

The magazine listed "Treasure," "Count On Me," "Just the Way You Are," and "Marry You" as the most popular tracks for wedding ceremonies and receptions.

According to The Mirror, soccer player Sean Murdoch proposed to his girlfriend Charissa Fegusson via a flash mob that used "Marry You" to dance with.

The proposal reportedly put "New York's famous Times Square to a complete standstill" according to the news outlet. This isn't the only proposal that used the singer's popular love songs as well. A quick search on Youtube will display several results.

With his songs becoming such a "wedding staple" for lovers, will Bruno Mars and girlfriend Jessica Caban also use these songs for their special day in the future?

Being a talented songwriter, however, Mars would most likely write and produce his own proposal and wedding song. Until then, we can only enjoy hearing him promise to catch a grenade for the girl he loves.