Mars picked up all the awards he was nominated for, including album of the year Bruno Mars was the big winner at this year’s Grammy Awards – winning all six awards he was nominated for, including album of the year. His album 24K Magic picked up record of the year for the title track, song of the year for That’s What I Like and best R&B album. But Mars’ victory was rap’s defeat. Jay-Z was the leading nominee with eight nods but left empty handed, one year after his wife Beyonce missed out on album of the year to Adele. Kendrick Lamar, widely expected to pick up the evening’s main prize for his fourth album DAMN,…