Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Title | Year | Peak chart positions\nUS | Peak chart positions\nUS\nR&B | Peak chart positions\nUS\nRap | Album |
| --- | --- | --- | --- | --- | --- |
| "Believe Me"\n(featuring Dave Patten) | 2011 | — | — | — | Non-album singles |
| "Ima Boss" (Remix)\n(featuring DJ Khaled, T.I., Rick Ross, Lil Wayne, Birdman and Swizz Beatz) | 2011 | 51 | — | — | Non-album singles |
| "House Party"\n(featuring Young Chris) | 2011 | — | 45 | 24 | Dreamchasers |
| "Wild Boy" (Remix)\n(MGK featuring Steve-O, 2 Chainz, Meek Mill, Mystikal, French Montana and Yo Gotti) | 2012 | — | — | — | Non-album singles |
| "My Nigga" (Remix)\n(YG featuring Lil Wayne, Rich Homie Quan, Meek Mill and Nicki Minaj) | 2014 | — | — | — | My Krazy Life |
Question:
how many titles do not have an album?
Answer:
2